Broad Algorithmic Elements to Ranking on Google – 2009
24%= Trust of the Host Domain; otherwise known as Domain Authority
22%= Link Popularity of the Page; how many links are going to the specific page
20%= Anchor Text of the External Links; the keywords you are using to link to your site
15%= Keyword Usage; are your keywords being searched and how much
7%= Traffic and Click Through Data; how long are viewers staying at your site etc.
6%= Social Graph Metrics; your social media
5%= Registration & Hosting Data; your hosting service