Google's Algorithm 2010 Revealed

Google's Score = (Kw Usage Score * 0.3) + (Domain * 0.25) + (PR Score * 0.25) + (Inbound Link Score * 0.25) + (User Data * 0.1) + (Content Quality Score * 0.1) + (Manual Boosts) - (Automated & Manual Penalties)

Search Engine Optimisation Key Word Usage Factors

* Keyword in title tags
* Rich Header tags
* Documents rich with relevant text information
* Keyword in alt tag
* Key words in internal links pointing to the page
* Key words in the domain and/or URL
* The order key words appear

Domain Strength / Speed

* Domain Strength
* Domain Speed
* Local/specific domain name
* Quality Hosting

Registration history

* When the Domain was registered
* Strength of the links pointing to the domain
* The topical neighborhood of domain based on the in bound and out bound links
* Historical use and links pattern to domain
* Inbound links and referrals from social media
* Inbound Link Score

Age & Quality of links

* Quality of the domains sending links (non paid)
* Links from Authority Websites
* Quality of pages sending links and relevance
* Anchor text of links
* Link quantity/weight metric (Page Rank or a variation)
* Subject matter of linking pages/sites
* User Data

Historical CTR to page in SERPs

* Time users spend on a page
* Search requests for URL/domain
* Historical visits/use of URL/domain by users

Content Quality Score

* Duplicate content filter
* Order of key words in content
* Content update frequency
* Highlighted and visibility of keywords
* Usability and W3C rules