by seomoz
Top 5 Ranking Factors
Keyword Focused Anchor Text from External Links:73% very high importance,
External Link Popularity (quantity/quality of external links):71% very high importance,
Diversity of Link Sources (links from many unique root domains):67% very high importance,
Keyword Use Anywhere in the Title Tag:66% very high importance,
Trustworthiness of the Domain Based on Link Distance from Trusted Domains (e.g. TrustRank, Domain mozTrust, etc.):66% very high importance
Top 5 Negative Ranking Factors
Cloaking with Malicious/Manipulative Intent:68% very high importance,
Link Acquisition from Known Link Brokers/Sellers:56% high importance,
Links from the Page to Web Spam Sites/Pages:51% moderate importance,
Cloaking by User Agent:51% moderate importance,
Frequent Server Downtime & Site Inaccessibility:51% moderate importance.
Top 5 Most Contentious Factors
Cloaking by Cookie Detection:16.3% strong contention
Cloaking by JavaScript/Rich Media Support Detection:15.4% moderate contention
Hiding Text with same/similar colored text/background:15.3% moderate contention
Cloaking by IP Address:15.3% moderate contention
Cloaking by User Agent:15.2% moderate contention