Google Patent Highlights Anti-Spam Techniques

Google's latest patent filing, "Information Retrieval Based On Historical Data" has opened up some interesting aspects of Google's fight against SEO and search engine spam.

Highlights include various confirmations of rank scoring factors:

1) evaluation of link growth

2) evaluation of quality based bookmarking and volume of return visits from bookmarks

3) evaluation of quality of domain based on years of registration.

4) gradual increase of content on site

5) click pop in the serps leads to higher scoring.

6) identical anchor text penalty / artificial variation of anchor text penalty

7) outbound links to trustworthy sites

More to come, but its 30 pages of tech speak...