I know there is three type of seo (i)white hat, (ii)gray hat and (iii)black hat. But I want to know more detailed information about all these.
In my understanding White Hat - Site content is great and everyone who reads it just can't get enough of it so the site starts to get popular naturally with other sites linking to it, hard to do though Grey Hat - Site content is great but there is help involved on getting link popularity like article writing linking back to the site, blog commenting, so it looks natural but with help Black Hat - Sneaky stuff going on like buying links, cloaking, page redirects, paying for traffic, basically doing anything misleading to get traffic or links
Basically there are two types of Search engine optimization techniques available around the globe. white hat seo and black hat seo. Legally using the search engine optimization techniques for the optimization of the websites are called white hat seo, while using illegal means to promote the websites is called black hat seo. Which are clearly banned for main search engines like Google, Yahoo and Bing.com