SEO (Search Engine Optimization, 搜尋引擎最佳化) 的最重要因素排行如下
Title Tag - 4.57 
Anchor Text of Links - 4.46 
Keyword Use in Document Text - 4.38 
Accessibility of Document - 4.3 
Links to Document from Site-Internal Pages - 4.15 
Primary Subject Matter of Site - 4.00 
External Links to Linking Pages - 3.92 
Link Popularity of Site in Topical Community - 3.77 
Global Link Popularity of Site - 3.69 
Keyword Spamming - 3.69