SEOMOZ的排名因子笔记（一）
by Pickle Cai
SEOMOZ上也有一个篇关于排名因子的文章。由于文章是Alex找来的，所以自然……我又挨了一顿……
文章：http:http://www.seomoz.org/article/search-ranking-factors
注：内容是综合各人意见后，进行了一些统计学处理，所以量化了一下，分重要程度和专家意见的一致程度两个维度。
先列出几个top5：
Top 5 Ranking Factors——
73%：Keyword Focused Anchor Text from External Links
71%：External Link Popularity (quantity/quality of external links)
67%：Diversity of Link Sources (links from many unique root domains)
66%：Keyword Use Anywhere in the Title Tag
66%：Trustworthiness of the Domain Based on Link Distance from Trusted Domains (e.g. TrustRank, Domain mozTrust, etc.)
Top 5 Negative Ranking Factors——
68%：Cloaking with Malicious/Manipulative Intent
56%：Link Acquisition from Known Link Brokers/Sellers
51%：Links from the Page to Web Spam Sites/Pages
51%：Cloaking by User Agent
51%：Frequent Server Downtime & Site Inaccessibility
Top 5 Most Contentious Factors——
16.3% strong contention：Cloaking by Cookie Detection
15.4% moderate contention：Cloaking by JavaScript/Rich Media Support Detection
15.3% moderate contention：Hiding Text with same/similar colored text/background
15.3% moderate contention：Cloaking by IP Address
15.2% moderate contention：Cloaking by User Agent
Overall Ranking Algorithm——
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
后来发现（2010年3月3日），http:http://yi-it.com/blog/pivot/entry.php?id=62也有此内容的中文版，不过略简些。
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