Timeline of Google Search

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Google Search, offered by Google, is the most widely used search engine on the World Wide Web as of 2014, with over three billion searches a day. This page covers key events in the history of Google's search service.

For a history of Google the company, including all of Google's products, acquisitions, and corporate changes, see the history of Google page.

Big picture

Time period Development
1996–1997 Development of basic technology, launch of search engine
2000 Internationalization: search is launched in 13 new languages.
2001–2004 Google launches many new search categories, such as Google News, Google Books, and Google Scholar.
2002 onward The beginning of explicitly announced search algorithm updates.
2008–2010 Faster search experience for user: Google Suggest (experimental launch 2004, integrated into main search engine 2008), Google Instant (2010), and Google Instant Previews.
2005, 2009, 2012 Google starts using web histories to help in searches (2005), experimentally launches social search (2009), and launches Search Plus Your World (2012).
2009–2010 Caffeine update for faster indexing of the web and fresher and on-topic search results.
2011–2014 Google Panda (an update to some parts of Google's search algorithm) is released in 2011, with announced updates continuing till September 2014 (Panda 4.1). Stated goals include cracking down on spam, content farms, scrapers, and websites with a high ad-to-content ratio.
2012–2014 Google Penguin (an update to some parts of Google's search algorithm) is released in 2012, with the goal of concentrating on webspam. The last named update is in October 2014. Starting December 2014, Penguin moves to continuous updates (Penguin Everflux).
2012 onward Google integrates the Knowledge Graph into its search results.
2013 Google releases Google Hummingbird, an update that may enable semantic search in the future and integrate better with the Knowledge Graph.
2014 onward Google makes a major update to its algorithm for local search. The update gets the name Google Pigeon.
2015 onward Google alerts webmasters to mobile usability issues in January, and announces a major update to its search algorithm, to be rolled out starting April 21, 2015, that will heavily demote mobile-unfriendly sites for web searches on mobile devices.

Full timeline

Year Month and date (if available) Event type Subtype / affected aspect Affected algorithm Event
1996 January–March Prelude Larry Page and Sergey Brin, graduate students in computer science at Stanford University, begin working on BackRub, the precursor to Google Search. Page begins work alone initially, supported by a National Science Foundation Graduate Fellowship, and Brin joins him shortly thereafter. The project is an outgrowth of their work on the Stanford Digital Library Project.[1][2][3][4] Web crawling begins in March.
1997 September 15 Domain The domain Google.com is registered.[5]
1999 Gaming of search results (Google bomb) The first known instance of a Google bomb is reported around this time, with a search for "more evil than Satan itself" bringing up the Microsoft website. The perpetrators of the Google bomb are not known.[6]
2000 May 9 Internationalization Google adds ten new languages: French, German, Italian, Swedish, Finnish, Spanish, Portuguese, Dutch, Norwegian and Danish.[5]
2000 September 12 Internationalization Google launches search services in Japanese, Chinese, and Korean.[7]
2000 September Gaming of search results (Google bomb) A Google bomb is created around this time by Hugedisk Men's Magazine, an online humor magazine, with the search term "dumb motherfucker" linked to a website selling George W. Bush merchandise. A similar attempt for an Al Gore website is not successful.[8][9]
2000 October Advertising Google AdWords launches with 350 customers.[5]
2000 December User experience Google Toolbar is released, allowing people to search without visiting the Google homepage, and also offering them more information about the webpages they visit.[5] Some commentators have argued that this marks the beginning of search engine optimization and the Google Dance.[10]
2001 April 6 Gaming of search results (Google bomb) Adam Mathes coins the term talentless hack. He creates a Google bomb for the term "talentless hack" to the website of his friend Andy Pressman by recruiting fellow webloggers to link to his friend's page with the desired term.[11]
2001 July Search category Google launches Google Image Search with over 250 million images in its search database.[5]
2001 December Review Google releases its first annual Google Zeitgeist.[5]
2002 The Googlefight website (unaffiliated with Google), that allows people to compare results of two search queries on Google, likely launches in this year. It is given permission by Google to use the name sometime during the year.[12]
2002 January 8 The term Googlewhack is introduced by Gary Stock for a search query that has exactly two words, without quotes, and returns exactly one result.[13]
2002 September Search category Google launches Google News.[5]
2002 September Search algorithm update Google makes the first publicly announced update to its search algorithm.[10] A number of Internet commentators view this as the death of PageRank (the name for Google's system for ranking pages) and a significant decline in the quality of Google's search results.[14][15][16]
2003 February Search algorithm update Google announces the Boston update at SES Boston.[10]
2003 April Search algorithm update Ranking Combating low-quality content and bad SEO tactics Google announces the Cassandra update. The update claims to crack down on link spam, including mutual links between co-owned websites, as well as hidden text and hidden links.[10][17]
2003 May Search algorithm update Indexing, ranking Google announces the Dominic update. Commentators believed that the update affected the way backlinks were counted, and many webmasters reported new bots from Google that bounced.[10][18]
2003 June Search algorithm update Google announces what will later turn out to have been the last of its regular monthly updates. This update is called the Esmeralda update.[10][19]
2003 July Search algorithm update Google announces the Fritz update, and also a change to its update policy, as it moves towards continuous rather than batch processing of updates.[10][20][21]
2003 September Search algorithm update Indexing Google announces a "supplemental index" in order to be able to index some parts of the web more rapidly.[22] The supplemental index would eventually be scrapped.
2003 November Search algorithm update Combating low-quality content and bad SEO tactics Google announces the Florida update, which commentators consider game-changing in that it completely destroyed the value of 1990s SEO tactics and ushered in a new era of search engine optimization.[23]
2003 December Search category Google launches Google Print, that would later become Google Books.[5]
2004 January Search algorithm update Combating low-quality content and bad SEO tactics Google announces the Austin update, to continue with the work of combating SEO tactics that Florida had made good progress on.[10][24][25]
2004 February 17–20 Search algorithm update Indexing Google announces the Brandy update, a massive index expansion, Latent Semantic Indexing (LSI), increased attention to anchor text relevance, and the concept of link "neighborhoods."[10][26][27]
2004 October Search category Google launches Google Scholar, its search service for academic publications.[5]
2004 December User experience Search suggestions Google Suggest is introduced as a Google Labs feature.[28][29]
2005 January Search algorithm update Indexing Combating low-quality content and bad SEO tactics To combat link spam, Google, Yahoo! and Microsoft collectively introduce the nofollow attribute.[10][30]
2005 February 2 Search algorithm update Google announces the Allegra update, whose effects are unclear.[10][31][32]
2005 May Search algorithm update Google announces the Bourbon update.[10][33][34][35]
2005 June Webmaster tools Google allows webmasters to submit XML sitemaps via Webmaster Tools, bypassing the need for HTML sitemaps.[10][36]
2005 June User experience Personalization Google launches personalized search that automatically taps into users' web histories.[37][38]
2005 June User experience Mobile search Google launches Google Mobile Web Search.[5]
2005 September Search algorithm update Ranking Although Google denies running an update, Matt Cutts clarifies that PageRank was refreshed for some pages recently (with a three-month refresh cycle) causing changes to many site ranks. Observers call this the Gilligan update.[10][39][40]
2005 September–November Search algorithm update Google announces and rolls out the Jagger update in three stages, one in September, one in October, one in November.[10][41][42]
2005 December (rollout continues till March 2006) Search algorithm update Indexing Google begins rolling out the Big Daddy update, continuing for the next few months until March 2006. The update changes URL canonization, site redirects, and related items.[10][43]
2006 May Analytics Public information on search trends Google releases Google Trends to make it easy to visualize the popularity of searches over time.[5]
2006 August 23 Customized search Google publicly launches Google Custom Search. The main part of this is Custom Search Engine, a functionality that allows users to build search engines with their own custom modifications of Google Search, specifically, restriction of the search queries to a subset of the web (e.g., a specific set of domains).[44]
2007 May 16 Search algorithm update Ranking, presentation Google launches Universal Search, integrating traditional search results with results from Google News, Google Image Search, Google Video Search, and other verticals. This is believed to be a major milestone in the user experience.[5][10][45][46]
2007 June Search algorithm update The Buffy update happens. It is not considered a deliberate update, but rather an accumulation of many smaller changes.[10][47][48]
2008 March 14 Transparency Quality raters guidelines For the first time on record, Google's quality raters guidelines are leaked.[49] Updated versions of the guidelines would continue to be leaked for several years until Google finally decides to make the guidelines publicly available in November 2015.[50]
2008 March 24 User experience Iterative search The New York Times reports that Google now offers "search within search": when people search for names of websites, the top search result, which links to the website, may include a search box to further search within the website.[51]
2008 March/April Search algorithm update Ranking The Dewey update seems to lead to a large-scale shuffling of results. Some observers believe that Google is pushing its own properties, such as Google Books, but evidence of this is limited.[10][52]
2008 August 25 User experience Search suggestions Google Suggest (later called Autocomplete), originally launched as a Labs feature in December 2004, now becomes part of Google's main site.[5][28][29]
2009 February Search algorithm update The Vince update happens. Matt Cutts calls it a minor change, but some SEO commentators consider it major.[10][53]
2009 February Webmaster tools Indexing Google, Microsoft, and Yahoo! announce joint support for tags that help bots identify canonical versions of webpages without affecting human visitors.[54][55]
2009 August 10 (announced), rollout completed and made live June 8, 2010 Search algorithm update Indexing, ranking Faster updates to search results Named Caffeine, this update is announced on August 10, 2009. It promises faster crawling, expansion of the index, and a near-real-time integration of indexing and ranking.[10][56][57][58][59] The rollout is made live on June 8, 2010.[60][61][62]
2009 October 26 Search category Social search Google introduces Social Search as a Google Labs feature.[63] The feature is expanded further in late January 2010.[64]
2009 December 7 Search category Real-time search Google launches real-time search for real-time Twitter feeds, Google News, and other freshly indexed content.[10][65][66]
2010 Late April, early May Search algorithm update Ranking Combating low-quality content and bad SEO tactics The update, named May Day, is an algorithm change affecting the long tail. Foreshadowing Google Panda, the update penalizes sites with large amounts of thin content.[10][67][68]
2010 September 8 User experience Search suggestions Google launches Google Instant, described as a search-before-you-type feature: as users are typing, Google predicts the user's whole search query (using the same technology as in Google Suggest, later called the autocomplete feature) and instantaneously shows results for the top prediction.[69][70][71] Google claims that this is estimated to save 2–5 seconds per search query.[72] SEO commentators initially believe that this will have a major effect on search engine optimization, but soon revise downward their estimate of the impact.[10][73]
2010 November 9 User experience Information in SERPs Google launches Instant Previews, a feature where users can view previews of the ranked pages by hovering over the links in the search engine results page.[10][74][75][76]
2010 December 1 Search algorithm update Ranking Combating low-quality content and bad SEO tactics Google updates its algorithm to penalize websites that provide a bad experience to users. The update is prompted by a November 26 New York Times story about a fraudulent company called DecorMyEyes that used the publicity generated by negative customer reviews to rise in the search engine rankings.[10][77][78]
2010 December Search algorithm update Ranking Social signals Both Google and Microsoft's Bing indicate that they use social signals, including signals from Twitter and Facebook, to rank search results.[10][79][80]
2011 January–February Search algorithm update Ranking Combating low-quality content and bad SEO tactics Foreshadowing Google Panda, Google penalizes Overstock.com and JCPenney for the use of SEO tactics.[10][81][82]
2011 January 28 Search algorithm update Ranking Combating low-quality content and bad SEO tactics Google launches its Attribution algorithm change to better sieve out websites that scrape content. Matt Cutts claims that slightly over 2% of search queries are affected, but less than 0.5% of results change noticeably.[10][83][84]
2011 February 23–24 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) Google launches Google Panda, a major update affecting 12% of search queries. The update continues with the earlier work of cracking down on spam, content farms, scrapers, and websites with a high ad-to-content ratio.[10][85][86][87] The rollout is gradual over several months, and Panda will see many further updates.
2011 March 30 User experience, incorporation of user feedback Google launches the +1 button so that users can offer feedback on search results.[88] Commentators liken this to the like button seen on Facebook.[89][90]
2011 April 11 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) Google rolls out Panda to all English queries worldwide (not limited to English-speaking countries) and integrates new signals into its ranking algorithm.[10][91][92]
2011 May 9 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) Google rolls out further minor updates to Panda but does not discuss them in detail, saying they are more like Panda 2.1 than Panda 3.0.[10][93][94]
2011 June 2 Webmaster tools Indexing Google, Yahoo!, and Microsoft announce Schema.org, a joint initiative that supports a richer range of tags that websites can use to convey better information.[10][95][96][97]
2011 June 21 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) Google rolls out Panda 2.2.[10][98][99][100]
2011 July 23 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) Google rolls out Panda 2.3.[10][101]
2011 August 12 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) Google rolls out Panda 2.4, making Panda available in all languages around the world, except Chinese, Japanese, and Korean.[10][102][103]
2011 August 16 User experience Information in SERPs Google rolls out expanded sitelinks, starting with 12-pack links (but later reducing to 6-pack).[10][104][105]
2011 September 15 Webmaster tools Indexing Google rolls out pagination elements for websites to communicate to Google that various webpages are different pages of the same article.[10][106][107]
2011 September 21 Bias concerns in search results Ranking In hearings before the United States Senate, Jeremy Stoppelman of Yelp and Jeffrey Katz of Nextag claim that Google search results are biased against competing offering s such as the reviews on Yelp, while Google still benefits from the information in these reviews. Eric Schmidt of Google claims that Google search results are not biased, and Google aims to offer search results that best meet the needs of users.[108]
2011 September 30 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) Google rolls out Panda 2.5.[10][109] Although the specifics of the update are unclear, a few sites gain significantly and a few others lose significantly.[110] Other minor flux updates occur on October 3, October 5 and October 13, and some commentators call these Panda 3.0 and 3.1.[10][111]
2011 October 18 User experience Privacy of search queries Google announces that they will start encrypting all search queries for security purposes.[112] This disrupts organic keyword referral data for many websites, making search engine optimization harder.[113]
2011 November 3 Search algorithm update Indexing, ranking Faster updates to search results Google announces a Freshness update that would give priority to fresher, more recent search results, and claims this could affect 35% of search queries.[114][115][116] The algorithm largely affects time-sensitive queries. A number of sites gain and many others lose as a result of the update.[117]
2011 November 14 Search algorithm update Google announces a 10-pack of updates, and says that this begins a series of monthly announcements of packs of updates.[10][118]
2011 November 18 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) Google releases an allegedly minor Panda update, which SEO commentators label as Panda 3.1, despite the lack of a generally agreed upon update named Panda 3.0.[10][119][120]
2012 December 2011-January 2012 (announced January 5) Search algorithm update, user experience A 30-change pack of updates, including landing-page quality detection, more relevant site-links, more rich snippets, and related-query improvements.[121]
2012 January 10 Search algorithm update, user experience Google launches Search Plus Your World, a deep integration of one's social data into search.[122][123] SEO commentators are critical of how the search results favor Google+ and push it to users, compared to more widely used social networks such as Facebook and Twitter.[124][125][126][127]
2012 January 19 Search algorithm update Ranking Combating bad user experiences (heavy content, slow content, bad user experience) Google updates its algorithm to introduce a penalty for websites with too many ads "above the fold". The update has no name, but some SEOs use "Top Heavy" to describe the update.[10][128]
2012 February 27 Search algorithm update Ranking Local search The update, codenamed Venice, is announced as part of Google's end-of-February 40-pack update. Venice seems to give substantially increased weightage to local results (location inferred from the user's IP and other signals) for many search queries, such as those looking for businesses of various types in the vicinity.[10][129][130] On the same date, Google rolls out Panda 3.3, which it bills as a data refresh rather than an algorithm change.[131]
2012 March 23, April 19, April 27 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) March 23: Google rolls out Panda 3.4, which is claimed to affect 1.6% of search queries.[132]
Google quietly rolls out Panda 3.5 (April 19) and Panda 3.6 (April 27), with minimal impact.[133][134]
2012 April 24 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Penguin) Google launches its "Webspam update" which would soon become known as Google Penguin.[10][135][136][137][138]
2012 May 16 Search algorithm update, user experience Ranking, information in SERPs Knowledge Graph Google starts rolling out Knowledge Graph, used by Google internally to store semantic relationships between objects. Google now begins displaying supplemental information about objects related to search queries on the side.[10][139][140][141]
2012 May 25 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Penguin) Google rolls out an update of Google Penguin, variously called Penguin 1.1 and Penguin 2.[142]
2012 June–September Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) Google rolls out updates to Google Panda: 3.7 (June 8),[143][144] 3.8 (June 25),[145][146] 3.9 (July 24),[147] 3.9.1 (August 20),[10] and 3.9.2 (September 18).[10]
2012 July 26 Third-party tracking SERP volatility measurement Moz launches MozCast, the "Google weather report". The tool, available online at mozcast.com, tracks the "temperature" of changes to Google's search algorithm and rankings on a day-to-day basis, helping provide better context to search algorithm changes beyond just the biggest ones.[148][149][150]
2012 August 10 Search algorithm update Ranking Combating policy violations (copyright) Google announces that it will start penalizing websites with repeat copyright infringements, possibly as measured by DMCA takedown requests.[151] Some SEO commentators call this the Pirate update.[152]
2012 September 27 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) Google rolls out a major update to Google Panda (the update is to the underlying algorithm, rather than merely being a data refresh), that would be dubbed Panda 4.0, but SEO commentators decide to simply call it Panda #20. The change is estimated to have affected 2.4% of search queries.[10][153]
2012 September 27 Search algorithm update Ranking Google announces changes in the way it handles Exact-Match Domains. The change is estimated to have affected 0.6% of search queries.[154][155]
2012 October 5 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Penguin) Google releases minor tweaks to Penguin, affecting about 0.3% of search queries. SEO commentators call it Penguin #3, following the lead of Panda in ditching the use of 1.x notation in favor of labeling updates by number.[10][156][157]
2012-13 November 2012-January 2013 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) Google releases updates to Google Panda: #21 (November 5, affecting 1.1% of queries), #22 (November 21, data refresh only), #23 (December 21, data refresh only, affecting 1.3% of queries), and #24 (January 22, affecting 1.2% of queries).[10]
2012 December 4 Search algorithm update Knowledge Graph Google adds Knowledge Graph to non-English queries, and says that the change goes beyond translation and also adds enhanced Knowledge Graph capabilities.[10][158][159]
2013 March Third-party tracking SERP volatibility measurement Algoroo, a tool to track changes in Google Search rankings and identify algorithm changes, launches, initially in pre-alpha.[160][161][150]
2013 March 13–14 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) Google rolls out Panda #25. Remarks by Matt Cutts at SMX West give people the impression that this is the last update to Panda as a distinct entity and it will thereafter be integrated into the core algorithm.[10][162][163] On June 11, 2013, Cutts clarifies that Panda updates roll out over 10-day periods every month and are not continuous.[164]
2013 May 22 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Penguin) Google rolls out a new version of Google Penguin that it calls Penguin 2.0, which SEO commentators call Penguin #4.[165][166]
2013 July (or earlier) User experience Information in SERPs "Answer boxes" (an early name for featured snippets) are spotted and discussed by SEO experts. These build upon Google's knowledge graph capabilities, to show a box containing the key "answer" to the search query, usually right above the search results. These are distinct from the knowledge graph cards (also known as knowledge cards or knowledge panels) that appear on the right.[167]
2013 August 6 Search algorithm update, user experience Ranking Google adds a new feature called "in-depth articles" in its search results to feature long-form content of long-lasting value.[10][168][169]
2013 August 21–22 (approximate date for rollout), September 26 (announcement) Search algorithm update Ranking Core Google releases Google Hummingbird, a core algorithm update that may enable more semantic search and more effective use of the Knowledge Graph in the future.[10][170][171]
2013 October 4 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Penguin) Google announces what it calls Penguin 2.1, its fifth version of Penguin, claiming to affect 1% of searches. The effect seems minor.[10][172][173]
2014 May 16 Search algorithm update Ranking Combating low-quality content and bad SEO tactics Payday Loans 2.0 algorithm change is purely low quality external link related and over-optimization. This specifically goes after high search, spammy queries such as “Payday Loans”. Google is trying to devalue sites that perform in link buying and other black hat methods to game the algorithm.[174]
2014 May 20 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) Panda 4.0 is implemented to devalue sites that contained poor / low quality content. This has been an ongoing battle that Google has been chipping away at for years. Google has claimed that the algorithm change has impacted roughly 7.5% of all search queries.[175]
2014 July 3 Team Matt Cutts, a Distinguished Engineer at Google who has been heading the web spam team since 2004, goes on leave till October.[176] He later extends his leave through 2015.[177]
2014 July 24 Search algorithm update Ranking Local search (Pigeon) Google announces the rollout of Google Pigeon, a major update to its search algorithm for "local" searches such as searches related to events or businesses near one. The Pigeon update gives more weight to various search signals to deliver more relevant local results.[10][178][179]
2014 August 6 Search algorithm update Ranking HTTPS boost Google announces search results will give preference to sites using HTTP Secure and SSL encryption. This added ranking signal would be a "lightweight" ranking boost.[180]
2014 August 28 User experience Information in SERPs Google Authorship is removed completely from search results, as already on December 2013 it reduced number of images showing in SERP's. Now it's totally gone to extinction due to lower adaptation rate by authors, to reduce mobile bandwidth and to improve user experience.[10][181][182][183]
2014 September 23 (rollout begins), September 25 (announcement) Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) Google announces that a significant update to Google Panda is rolling out over the next few weeks. The update is dubbed Panda 4.1.[10][184][185] An analysis reveals that the update was heavy on attacking affiliate marketing, keyword stuffing, security warnings, and deception.[186][187]
2014 October 17 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Penguin) Penguin 3.0 is implemented as a refresh to re-evaluate sites demoted in the last update due to webspam tactics and demote sites using black hat SEO tactics. This refresh is rolled out globally over several weeks impacting roughly 1% of English-language queries.[10][188]
2014 October 21 Search algorithm update Ranking Combating policy violations (copyright) Pirate 2.0 update dubbed by SEO commentators following the similar update in 2012 which penalized sites deemed as violators of copyright laws. This refresh targets a relatively small number of known sites causing dramatic drops in ranking. In tandem with this Google introduces a new Ad Format for queries where people may be searching for copyrighted media, requiring publishers to purchase ads to promote original content over the unauthorized copies.[10][189][190][191]
2014 December 10 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Penguin) Google announces that Google Penguin will switch to continuous updates, also known as "Penguin Everflux".[10][192]
2014 December 22 Search algorithm update Ranking Local search (Pigeon) Google Pigeon, the local search algorithm update, is rolled out to the United Kingdom, Canada, and Australia.[10][193]
2015 February 4 User experience Information in SERPs Direct action links and expanded text in answer boxes are spotted for searches for content beyond Google's own documentation (in November 2014, these had been spotted but only for Google's own documentation).[194] This leads to further discussion around optimizing for one's content to show up in the answer box.[195] Possibly related: many independent sources report significant fluctuations in Google Search results, but Google does not officially confirm any changes.[10][196]
2015 April 21 (pre-announced February 26) Search algorithm update Ranking Mobile usability On January 19, 2015, Google sends emails to webmasters about mobile usability issues on the websites, leading people to speculate that a major mobile usability update for search rankings is underway.[197] On February 26, 2015, Google announces that demotion of mobile-unfriendly sites for searches on mobile devices will commence on April 21, 2015.[198][199][200][201]
2015 May 3 Search algorithm update Ranking Core Google says it has made a core algorithm change impacting "quality signals". Before the official announcement, commentators had dubbed the changes as "Phantom 2".
2015 July 17 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Panda) Google announces an update to Google Panda, dubbed as Panda 4.2 by commentators. Google says that the change affects between 2% and 3% of search queries. Search engine commentators do not notice any sharp changes to search traffic, and expect the changes to be rolled in gradually.[202][203] By September, it appears that many websites that had seen gains due to Panda 4.2 are seeing those gains reversed.[204]
2015 October 26 Search algorithm update Ranking Google announces that RankBrain, a machine learning-based engine (using neural networks), has been the third most influential factor in its search rankings for the last few months. The actual rollout date is not confirmed, but commentators pin the launch time to Spring 2015. It is most useful for new search queries, that account for about 15% of search queries.[10][205][206] Later discussions of Google search quality would mark the introduction of Rankbrain as a turning point (for the worse) in Google's helpfulness with obscure searches, arguing that Google incorrecty approximates the search query to a related, more mainstream search query rather than trying to literallly address the obscure search query.[207]
2015 November 19 Transparency Quality raters guidelines Google releases the full versions of its search quality raters guidelines (QRG), a 160-page-long handbook that it previously only gave human evaluators to rate websites. The guidelines help websites understand what qualities Google Search would like to see in websites, although ratings made by raters based on these guidelines do not directly change search engine rankings. The release follows a leak in October 2015 of the same guidelines[50] Two important pieces of jargon that gain currency in the SEO world due to these guidelines are: YMYL (your money or your life), a term for websites that offer information or allow people to take actions that have the potential to negatively impact the end user's health and wealth (examples include sites related to e-commerce, financial advice, medical advice, and legal advice), and E-A-T (expertise, authoritativeness, and trust), factors that are important to Google Search for ranking sites, and even more important for YMYL sites.[208]
2016 February 3 Team Amit Singhal steps down from his position as Vice President of Search at Google after 15 years in that role. He is replaced by John Giannandrea who works in artificial intelligence at Alphabet, Google's parent company.[209][210] There is speculation that this will lead to more incorporation of machine learning and AI techniques in Google Search.[211]
2016 February 18 and 23 Advertising Google makes changes to Google AdWords, removing right-column ads and rolling out 4-ad top blocks on searches with commercial intent. The change has implications on organic search CTRs for such searches, since it pushes the organic search results further down the page, potentially reducing organic search CTRs.[212] Up to three additional ads may be shown below the 10 organic search results, and additional ads may be shown on the second page.[10][213][214][215]
2016 May 12 (announced March 16) Search algorithm update Ranking Mobile usability Google rolls out a ranking signal boost to benefit mobile-friendly websites on mobile devices. This is the second update of this sort, with the previous update in April 2015.[10][216][217]
2016 September 1 Search algorithm update Ranking Local search SEO commentators note massive changes to the algorithm for local searches, the biggest since Pigeon. The update is labeled Possum, indicating that some business listings have been filtered rather than actually disappearing. This is attributed to an updated, smarter deduplication algorithm, finer geolocation-awareness, and more decoupling of algorithms used for local search results from the main search results.[10][218] The implications of Possum on local SEO would be discussed for months to come.[219][220][221]
2016 September 23 Search algorithm update Ranking Combating low-quality content and bad SEO tactics (Penguin) Google announces a Penguin update, and says that Penguin is now part of Google's core ranking algorithm. Commentators dub this Penguin 4.0.[10][222][223] SEOMOz identifies likely dates for phase 1 and phase 2 rollouts as September 27 and October 6.[10]
2017 January 10 Search algorithm update Ranking Combating bad user experiences (heavy content, slow content, bad user experience) Google announces that it will crack down on intrusive interstitials on mobile web pages, such as popups that cover the main content, standalone interstitials that the user has to dismiss, and above-the-fold content that looks like an interstitial.[10][224] The plan to introduce this penalty was announced in August 2016.[225]
2017 February 21 Customized search Google announces that it is deprecating Google Site Search, its offering for websites that offers a highly site-customized site search solution. Starting April 1, 2017, it will discontinue sales of Google Site Search. The product will be completely shut down by April 1, 2018.[226][227][228]
2017 April 25 User experience, incorporation of user feedback Google announces quality improvements to search and more direct feedback options for users for search results and Featured Snippets (the new, official name for what the SEO community had previously called "answer boxes").[229]
2017 late October and November User experience Information in SERPs Search engine trackers notice a decrease in the percentage of search queries showing featured snippets from ~16% to ~14%, after a mostly steady increase for two years. This is also accompanied by an increase in the percentage of knowledge panels, mostly for the same queries.[10][230][231]
2017 November Transparency Communication of algorithm updates The Twitter account @searchliaison is created, through which Google's search liaison Danny Sullivan can officially communicate updates related to Google Search algorithm updates. Sullivan would continue to use his own Twitter handle @dannysullivan for updates that are not official communications.[232]
2017 December 1 User experience Information in SERPs Google increases the length of the snippets it includes for each search result.[10][233]
2018 March Search algorithm update Ranking Core Google makes a core algorithm update that affects the rankings of a number of websites, some positively, some negatively. The update is labeled the "brackets" update by Glenn Gabe. Google as well as SEO commentators say that websites adversely affected should not be looking to make quick fixes, but rather should continue improving their site over the long term.[10][234][235]
2018 January 15 Review A blog post by Tim Bray titled "Google Memory Loss" provides evidence suggesting that Google can no longer reliably be used to find old content even with exact keyword searches. In comparison, in the specific examples he checked, Bray was able to find the pages using both Bing and DuckDuckGo.[236] Bray's post is shared to Hacker News where it gets an unusually large number of view and comments from users who share their frustrations around Google and its alleged decline. The RankBrain update is cited as a turning point (for the worse) in Google's helpfulness for obscure searches by many commenters.[207]
2018 March 14 User experience Information in SERPs For one week, Google experiments with defaulting to show no search results for simple queries such as mathematical expressions and date/time lookups, with the search results available through a button that needs to be clicked to show them. Most real-world queries are not affected, but there is discussion of what this experiment means for the future of search.[237]
2018 March 26 Search algorithm update Indexing Google announces that it is rolling out its switch to mobile-first indexing at a wider scale; the version of a page that Google will keep in its index and use to make ranking decisions will be the mobile version.[10][238][239]
2019 May Search algorithm update, user experience Personalization Google announces Incognito mode for Google Maps and Google search.[240][241][242][243]
2018 May 13 User experience Information in SERPs Google reduces the average length of snippets included with each search result from about 300 characters to 150-160 characters, similar to the level prior to the increase in snippet length at the end of November 2017.[10][244]
2018 June 14 User experience Information in SERPs Google moves videos in its desktop search results from organic-like results to a dedicated carousel, and the number of search engine results pages with videos increases significantly.[10] This has unexpected impact on some e-commerce retailers, because videos showing up in carousel mean that the site no longer appears in the organic search results.[245][246]
2018 July 9 Search algorithm update Ranking Mobile usability Google finishes rolling out to all users the incorporation of mobile speed into its ranking of webpages. The update affects only extremely slow webpages, and thus does not affect the majority of webpages.[10][247]
2019 May 7 Search algorithm update, user experience Google announces feature to be integrated into Google search that utilizes Google Lens and augmented reality. Google Lens adds new features like visual language translation of signs, audio reading of text, video demonstrations of recipes seen in magazines and scanning restaurant menus to show the most popular dishes. Also, Google Assistant is upgraded to be 10-times faster in responding to spoken requests. The company also introduces a newly designed Android Auto dashboard to make the in-car platform easier to use without distracting drivers.[248][249][250][251]
2019 July 26 Analytics Google announces addition of "AMP On Image Result", a new search area with aim at allowing publishers to view their traffic data from AMP in Google Images in a Search Console’s performance report for Google Images.[252][253]
2018 August 1 Search algorithm update Ranking Core Google rolls out a core algorithm update dubbed "Medic" by SEO observers.[10] The algorithm largely affects your money or your life (YMYL) sites, in particular health/medical websites, with some sites seeing significant improvements and others seeing significant declines.[254][255][256]
2019 March 12 Search algorithm update Ranking Core Google releases the March 2019 core update, a broad core algorithm update. SEO chatter suggests the update mainly affects YMYL sites, but Google claims that the algorithm is a broad core algorithm update and not targeted at any category.[10][257][258]
2019 April 5 and April 7 Search algorithm update Indexing Bug fix Due to a bug, Google seems to drop about 4% of pages from its search index on April 5 and April 7.[10][259]
2019 June Search algorithm update Core Google pre-announces its June 2019 Core Update a day ahead of the rollout. The update would take about five days to fully roll out, during which, the unrelated Diversity update also occurs.[260]
2019 August 1 Search algorithm update "Featured snippets are surely one of the most useful features that Google added to its search engine in recent years. Today, the company announced that it has recently updated the algorithm that powers these snippets to prioritize more recent information."[261][262][263]
2019 August 2 Competition Google announces that, some time in 2020, it will make available a Choice Screen on Android devices that will allow users to select a search provider from among Google and three others. The three options shown are to be selected based on a per-country auction conducted periodically.[264]
2019 September 5 "Google has added TV and movie recommendations to its search app in an attempt to solve the increasingly tricky problem of knowing what to watch."[265] "Google on Thursday said it wants to make it easier for people to find shows and movies on its search engine. If you type in a phrase like "good show to watch," the Google app will let you open up a new feature to swipe left or right on show recommendations (yes, like a dating app)."[266][267]
2019 September 9 Analytics Google announces shut down of its old Search Console.[268][269]
2019 September 10 Webmaster tools Indexing Google announces two new link attributes, sponsored and ugc, that are treated by Google as hints and may be used to replace nofollow in some cases.[270]
2019 September 20 Analytics Google adds new structured data report, allowing site owners to quickly check whether breadcrumb markup has been implemented correctly.[271]
2019 September 23 Analytics Google announces update in its Search Console, giving it the ability to return fresher data in the Search Performance report. "The Performance report helps webmasters and site owners better understand how their site performs on Google search".[272][273][274]
2019 September 24 Search algorithm update Ranking Core Google announces the September 2019 Core Update several hours ahead of launch. This update would appear to have a larger effect on rankings for Your Money or Your Life (YMYL) sites, however, the impact would not be as significant as the June core update, according to data from various SEO toolset providers.[260][10][275]
2019 October Search algorithm update Understanding query intent BERT Google introduces the BERT search algorithm. BERT (Bidirectional Encoder Representations from Transformers) is an open-sourced technique for natural language understanding aimed at improving the search engine’s understanding of queries — particularly longer spoken or written ones.[260][276][277][278] The algorithm is expected to change results rankings for up to one in 10 queries.[279][280][281][282]
2019 October Userbase As of date, Google search controls 88.3% of the search market in the United States.[283]
2019 October 28 Search algorithm update Indexing Google announces that Search would stop supporting Adobe Flash by the end of the year. In web pages with Flash content, Google would ignore the Flash content. Search would also stop indexing standalone SWF files.[284][285]
2019 November 14 Google Search launches a new feature that lets users check their pronunciation of unfamiliar words with the help of machine learning.[286][287][288]
2019 November 26 Google Search introduces new features: automatic updations of listings on Google My Business and local language support on the shopping experience.[289][290]
2019 December 5 "Google Search to Integrate Package Tracking" "A good example of this is the track package feature, a feature that incorporates a lot of different companies that you can check out and make sure that you are able to track the package that is shipping the product that you have purchased from said company." "This feature is going to be integrated into Google search, which means that now there will be a card below the search bar that can be used to find specific tracking details. All you would have to do is enter the company name followed by “package tracking”. For example, if the product you have purchased is from Amazon then your search query is going to be “Amazon package tracking”."[291][292][293][294]
2019 December 5 Transparency Quality raters guidelines Google updates its search quality evaluator guidelines. The revisions emphasized diversity, impartiality and pertained to language referring to users."[295]
2019 December 9 Search algorithm update Understanding query intent BERT Google announces that its natural language processing algorithm BERT would be released in over 70 languages globally. Until then, the algorithm was only applied to featured snippets in languages other than English.[296][297][298][299]
2019 December 10 Analytics "Google has this week launched a new listing of the top 100 product trends in a range of categories based on Google search volume increases over the past year. Called the Google Shopping 100, the data collection has its own mini-site and provides some interesting, and potentially valuable insight into what the key product and consumer trends were over the course of 2019."[300][301][302][303]
2019 December 16 Google Search and Google Maps introduce the ability to order food in Australia. Customers can order from fast food chains including Domino's Pizza, Boost Juice, Chatime, Guzman y Gomez, Pizza Hut and Grill’d, as well as local restaurants and cafes via HeyYou.[304][305][306]
2019 December 17 Analytics Google announces that fresher Discover data is now available within Google Search Console Performance reports. This allows site owners view data as recent as less than a day old.[307][308]
2019 December 27 Google search launches a 'Watchlist' service that lets users track shows and movies across platforms. The feature is only available on the Google app for Android and iOS.[309][310][311][312][313]
2019 Year round Google announces Disney Plus as its top trending search term of 2019.[314][315]
2020 January 13 Search algorithm update Google announces the release of a broad update to its core algorithm. The update is deemed big and seems to have a big effect on Your Money or Your Life (YMYL) sites.[10][316][317]
2020 April 23 Search algorithm update (presentation) Google announces that it is starting the rollout of a feature that will tell the user if there aren't great matches for the search, potentially with suggestions for how to improve the search query.[318][319]
2020 May 4 Search algorithm update Google announces the release of a broad update to its core algorithm. The update is deemed big and broad, bigger than the previous core update (January 2020).[10][320][321]
2020 October 20 Review An article in the Washington Post talks about how Google Search has been getting worse. Three points are made: (1) increasing proliferation of ads, pushing organic results farther down the page (and a continued blending of ads into content making them visually harder to distinguish), (2) inaccurate featured snippets that might push a political agenda, and (3) promotion of Google's own products (such as Google Maps, YouTube, Google Flights) even when inferior to other products.[322]
2020 December 3 Search algorithm update Google announces the release of a broad update to its core algorithm; SEO commentators; the maximum impact is seen by SEO commentators on December 4; the general view is that this is a fairly big update, comparable to and perhaps a bit bigger than the May 2020 update.[10][323][324]
2021 February 1 Insight Google announces the launch of an "About this result" available for individual search results that provides more information about the source, including entity information on the source (similar to a knowledge panel), and whether the result is a search result or an ad.[325][326] "About this result" would evolve in the coming months to include more information.[327][328]
2021 May 18 Search algorithm update Understanding query intent MUM Google announces its Multitask Unified Model (MUM) tool, that uses transformers / neural nets to understand human language and other information such as audio and video. MUM's understanding of text uses the T5 text-to-text framework.[329][330] The first real-world application of MUM, to COVID vaccine names, would be announced on June 29 as having been released.[331][332]
2021 June 2  – June 12 Search algorithm update Google releases a broad core algorithm update. This is supposed to be a smaller update because the original intended update is being split into two parts; one update in June and one in July. SEO commentators find the update to be smaller than the 2020 updates and also find that its effect is more spread out over time, with the bulk of the changes happening between Friday June 4 and Sunday June 6.[333][334] The rollout of the update finishes on June 12.[335]
2021 June 8 Competition Google removes the participation fee for search engines to be shown in its Android Choice Screen program in Europe, and increases the number of search engines listed from three to a higher number, with five on screen at a given time.[336][337]
2021 June 15 Analytics Google announces the release of Search Console Insights, a tool that surfaces insights by joining data from Search Console and Google Analytics.[338]
2021 June 15  – end of August Search algorithm update Ranking Combating bad user experiences (heavy content, slow content, bad user experience) (page experience) The rollout of Google's "page experience on mobile" update happens during this period. The update is limited to mobile searches, and gives weight to a "page experience" factor that includes performance on core web vitals, mobile usability, security issues, whether the site is HTTPS, and ads experience.[339][340]
2021 June (around middle of the month) User experience Information in SERPs Google starts testing a new feature that notifies searchers if the search results for the search query are changing rapidly; the idea is to warn users about stories that are actively evolving.[341][342]
2021 June 23, June 28 Search algorithm update Ranking Combating low-quality content and bad SEO tactics Google releases a two-part update to deal with spam; the first part is released on June 23 and the second part on June 28.[343][344]
2021 July 1  – July 12 Search algorithm update Ranking Core Google releases a broad core algorithm update. This is a followup to a broad core update done in June; these two were originally meant to be a single update. SEO commentators note that the update propagated quickly with the effects beginning to be seen shortly after Google's announcement of the rollout, in contrast with the June update that started a little later and had a longer period of increased volatility.[345][346][347]
2021 July 22 Transparency Explanation of search results Google announces that its "About this result" panel will now include reasons a particular search result was shown. Types of reasons spotted include: search terms that appear in the result, search terms related to your search, other websites with your search terms link to this result, this result has images related to your search, this result is in your language, this result is relevant for searches in your region.[327][325]
2021 November 17  – November 30 Search algorithm update Ranking Core Google releases a broad core algorithm update.[348] SEO companies generally find that the bulk of the impact of the update is within its first 24 hours, unlike some past core algorithm updates for which the high rankings flux continued for a few days.[349]
2022 February 22  – March 3 Search algorithm update Ranking Combating bad user experiences (heavy content, slow content, bad user experience) (page experience) As previously announced on November 4, 2021, Google executes on the rollout of using page experience as a ranking factor on desktop during this period. Page experience on desktop includes all the core web vitals as well as all the other page experience signals on mobile except mobile-friendliness.[350][351][352]
2022 May 25  – June 9 Search algorithm update Ranking Core Google releases a broad core algorithm update.[353][354][355] According to Search Engine Land, the update "was significant and hit fast" based on volatiility-tracking tools.[356] According to an article in Search Engine Journal, the winners include big e-commerce brands (such as Amazon, eBay, and Etsy) and video sites (such as YouTube, TikTok, Disney Plus, Hulu, and Twitch) while the losers include news and media publishers and reference websites. New SERP features related to visual SERPs are also spotted.[357]
2022 August 25  – September 9 Search algorithm update Ranking Combating low-quality content and bad SEO tactics Google releases a "helpful content" update that is intended to demote content that is written primarily for search engines, and promote content that it deems to be helpful to humans. The determination of whether content is helpful is done through machine learning, and validated via quality raters.[358]
2022 September 12  – September 26 Search algorithm update Ranking Core Google releases a broad core algorithm update. According to Search Engine Land, the update "hit fast but was less significant than previous updates" based on volatility-tracking tools; Semrush has a similar assessment.[359][360]

Numerical and visual data

Mentions on Google Scholar

The following table summarizes per-year mentions on Google Scholar as of May 31, 2021.

Year Google Search
1997 261,000
1998 342,000
1999 383,000
2000 467,000
2001 490,000
2002 546,000
2003 567,000
2004 595,000
2005 643,000
2006 664,000
2007 697,000
2008 679,000
2009 720,000
2010 730,000
2011 728,000
2012 674,000
2013 726,000
2014 690,000
2015 665,000
2016 602,000
2017 505,000
2018 366,000
2019 238,000
2020 120,000
Google Search tb.png

Google Trends

The image below shows Google Trends data for Google Search (Topic) from January 2004 to February 2021, when the screenshot was taken. Interest is also ranked by country and displayed on world map.[361]

Google Search gt.jpg

Google Ngram Viewer

The chart below shows Google Ngram Viewer data for Google Search from 1997 to 2019.[362]

Google Search ngram.jpg

Wikipedia Views

The chart below shows pageviews of the English Wikipedia article Google Search on desktop from December 2007, and on mobile-web, desktop-spider,mobile-web-spider and mobile app, from July 2015; to January 2021.[363]

Google Search wv.jpg

See also

References

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