Hi Friend, i am doing seo from last 18 months but i am not aware of black, white, or gray seo. i had read in one site, there is three types of seo. and they are displayed these three. Request you to let me know about these three. Thank You in advance.....
Blackhat methods are ones which google and the other SEs don't approve off, which can can get your site banned, if the Search engines suspect it.
You should google search for black hat seo. It basically means any method of seo that is "sneaky" or somehow tries to trick the search engine. Such as putting keywords on your page that are the same color as the background so you can hide them. Or even having too much duplicate content on your site may be considered black hat. I've never heard of gray hat seo, but I imagine it is still black hat, as long as you are doing anything that isn't real honest seo, it is black. White is the proper way you should do seo. Optimizing headings for keywords, page or post titles, and links. Nothing sneaky, nothing invisible, nothing repetitive.