Does Google Analytics data affect SEO?
Does adding the google analytics .js file to a page improve it's google ranking?
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No, it doesn't. Matt Cutts himself said in a video that while Google does use Google Toolbar statistics to play a part in ranking, Analytics data (and therefor I assume the actual inclusion of ga.js) is completely left out of the equation. http://www.youtube.com/watch?v=PZoesvNUPDQ