Re: BP Advanced SEO
Since this is more of a general SEO question and not so much a BP question I would refer you to some SEO guides that are pretty helpful:
Keyword Tools
http://searchengineland.com/the-giant-list-of-keyword-tools-41678
SEO Ranking Factors
http://www.vaughns-1-pagers.com/internet/google-ranking-factors.htm
The 2nd link is especially helpful. Good luck. 
