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Google referral traffic has ever so slightly shrunk.

Web analytics firm Parse.ly published an interactive graphic last week showing that Facebook has overtaken Google as the chief referral source for web traffic. The news was widely reported, including on sites like Poynter and FortuneParse.ly’s graphic updates daily, and it currently shows that Facebook refers 40 percent of traffic to sites analyzed by Parse.ly, eleven percent more than Google’s search traffic.

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Source: Observer