What is the difference between black and white and gray hat SEO?

White Hat SEO - SEOs the rules and regulation within the boundaries of the search engines prefer their technology. This means that they link building and search engine optimization on page according to the rules laid.

Black Hat SEO - SEOs who defies the rules according to season. They mostly have their way that either can be annoying and irritating are known.

Grey Hat SEO - SEOs that between the first two types are their techniques. It's either a new technique where a Black Hat and a white hat or a hard way to adapt the way they can be said.