As always, Bill Slawski from Seo by the Sea is researching the algorithms. In this great editorial, he is comparing Google Phil algorithm with Panda algorithm. Signals and patents derived from the need to serve AdSense ads probably influenced rankings for websites a lot before Panda arrived. Link: http://www.seobythesea.com/?p=6014 Additional [ Read More ]
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From Michael Gray… Covering the impact that social networks may play. Little outdated since Google rolled out Google+, but anyway, a good read. Link: http://www.wolf-howl.com/socialmedia/social-signals-seo/
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SEOMoz does a great yearly update to ranking factors. You can see the changes from previous year. Links: http://www.seomoz.org/article/search-ranking-factors http://www.seomoz.org/article/search-ranking-factors#contributors
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