SEO - Off Page factor -

1. Inbound links from other websites.
2. Their Volume (Appearance).
3. Velocity (How Many Links, How Fast).
4. Frequency Per Keyword Anchor Text.
5. Neighborhood (What Type of Neighborhood are the Links are From.
6. C Class IP Range (are they from the Same Block?) Same Server, Same Hosting Company.

SEO _ On-page Factor :

1. Inline code vs. Code Pulled from the Cloud or Linked via an rel attribute (Which Links Data from Server Side to a Page instead of putting the CSS or other code in the page) to Minimize Page-Load Time.
2. The HTML Output via the Programming Platform (aspx, cfm, php, etc.) and Whether or Not the Slugs (URL Format) and Code are Lean or Crawl-able to Search Engine Spiders.
3. Site Architecture, Continuity and Internal links
4. Sitemaps to Increase Crawl Depth and Frequency from Channeling Link-Flow to Less Popular or Frequented Internal Pages
5. The Relevancy of the Title Tag, Meta Data, Header Tags to the Primary Keyword.
6. How Relevant the Content in the Body Area is to the Meta, Internal Links, and Other On-Page Elements.
7. The Occurrence of Keywords, their Proximity to Other Related Keywords and Their Volume of Usage in a Document.
8. CSS (cascading style sheets) and Gzip Compression

Post By - Lalit

"Meta keywords contained on a given page does not influence the search results for *that* page. While yes, it may cause Google to do fill out your internal site search page for those phrases, which in turn they index and the resulting page can then be found in the search engines, that seems to be the extent of it."