In my eyes there are only 7 basic factors. All of them are a compilation of “second level” factors and / or build by addition of many single signals.
Backlinks
Content
Authority
Trust
Reviews
Retweets
Facebook Shares
in some cases: Reviews
你可能也喜欢
<iframe src=” […]
Facebook依然是美国的社交网络之王，P […]
百度向海龙:多维度打造“新搜索” 构建服务与 […]
[NEO Marketing]一張圖看如何在 […]