Ранжирование в Google – год 2009й
Основные критерии:
24% Trust/Authority of the Host Domain
22% Link Popularity of the Specific Page
20% Anchor Text of External Links
15% On-Page Keyword Usage
7% Traffic and Click-Through Data
6% Social Graph Metrics
5% Registration and Hosting Data
Остальное – на http://www.seomoz.org/article/search-ranking-factors
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