Black Hat Guide

Ammad r says:

White hat seo is where you obey the search engine rules and do not use manipulative methods which would be against their TOS. Basically original content and natural links would be white hat.

Black hat is where you disobey any rules which will be productive to your temporary search engine success. Black hats will use any means at their disposal to gain rankings and because of that they tend to get caught after a while. That is why most good black hats recycle domains frequently and keep restarting new ones to keep the money flowing.

The upside to white hat is long-term continued success. The up-side to black hat is short-term and perhaps faster success but which is limited. Black hat also takes some experience or you will get caught and banned before you make a dime
References :
http://www.espinteractivesolutions.com
http://www.prorepsvs.com

bestweb says:

There is not black white or blue SEO , the only is seo , definition: SEO. Getting your website search engine friendly as to be received and submit as requested by the search engines protocol. Search engines optimization.
References :
http://www.webandrank.com/knowledge-base.html#s

Webmaster S says:

White hat means good intentioned. Black Hat means manipulating search engines for bad results. There arekeyword only sites those are black hat sample
References :
http://freewebmasterforum.com