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"In a Google Tech Talk on October 22, 2012, Google's Chief Economist Hal Varian said that Google runs a lot of experiments.  So many that a typical Google searcher/user will see a dozen or more experiments when they access Google.Greg Linden caught this remark and posted it on his Google+ page.  He said around 26 minutes into the video Hal said:Any time you access Google, you probably are in a dozen or more experiments.Here is the video:The talk was about how to handle all that data and with dozens of experiments seen and acted on by each Google user several times per day - that is a lot of data.For a webmaster and SEO - it can be a challenge managing all those variables as well.Forum discussion at Google+."^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-tests-daily-16039.html>