1. Holistic, context-based approach is crucial for content quality
2. Technical performance and page architecture are very important
3. Proportion of keyword links dropped again on average
4. Social Signals: correlations decreased slightly, but are still high
5. User Signals (*NEW) in top rankings significantly more positive
Ranking Factors And Correlations At A Glance:
As in the previous analysis, relationships between the various ranking factors are shown using the Spearman correlation. The most important correlations as well as the most important averages for the top ten are shown in the following graph:
文章來自：
http://www.searchmetrics.com/en/knowledge-base/ranking-factors/