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-- Google SEO News and Discussion
---- Periodic Google filter. Has someone else seen this?
doc_z - 3:28 pm on Apr 25, 2012 (gmt 0)Thread source:: http://www.webmasterworld.com/google/4439635.htm
Without going into detail: the theory also explains why the filter appeared periodically. It was some interaction between by own algorithms and Google's filter leading to an up and down.
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