Launched 10 January 2012. Search plus Your World blended signed-in users’ Google+ posts, photos and profiles into results, sparking a backlash from Twitter and Facebook over self-preference.
Rolled out 11 April 2011. Panda 2.0 extended the quality algorithm to all English queries worldwide and used blocked-site data as a signal, hitting eHow UK, Ciao and HubPages.
Announced 1 December 2010. After a New York Times story, Google added an algorithm that demoted DecorMyEyes and hundreds of other merchants giving customers an extremely poor experience.
Confirmed in December 2010. Google and Bing told Search Engine Land they used tweeted links and author authority in some rankings, starting a decade-long social signals debate.
Launched 8 September 2010. Google Instant loaded results as users typed, sparking fears about long-tail SEO that did not come true; Google retired it in July 2017 as search went mobile.
Launched 20 April 2010. Google renamed its Local Business Center to Google Places, linked listings to Place Pages and added service areas, coupons and updates for owners.
Announced 7 December 2009. Google real-time search streamed tweets, news and fresh posts into results, ranking the latest items when relevant, until the Twitter deal ended in July 2011.
Announced 4 December 2009. Google extended personalized search to signed-out users, using 180 days of cookie-based search history, ending the idea of one ranking for everyone.
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