Google confirmed a major Panda update that likely included both an algorithm update and a data refresh. Officially, about 7.5% of English-language queries were affected. While Matt Cutts said it began rolling out on 5/20, our data strongly suggests it started earlier. Google Begins Rolling Out Panda 4.0 Now (SEL) Panda 4.0, Payday Loan 2.0 & eBay's Very Bad…
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