How Google measures your web site

Here are some of the elements that Google uses to measure the web site relevancy, regarding a "keyword".

• Website information On site information
  • The keyword is part of the domain name
  • The keyword appears within the title tag
  • The keyword appears in the page content
  • How often does the content changes? Google loves new content
  • The web site age. how long has this web site been around
  • The web site renewal date. A doamin registered for another year gets less points than a domain registered for 5 years
• Off site
  • The keyword appears in the links pointing to the web site
  • The Websites these links are on
    • Are they relating to the same subject?
    • Are they from the same area?
    • Is this a two way link?
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• Google and user behavior
  • Time spent on the web site
  • Clicks from Google result pages and return to the Google SERP