SEO TECHNIQUES IN TO DIFFERENT TYPES:
WHITE HAT :
White hats produce is long lasting results and fallows the search engine guidelines. White hat primarily in making a matchless content for user, not for search engines.
Whereas black hats bring a short term result and your sites may be banned one time the search engines detect what they are up to.
White Hat is increases the values and rely more on the quality of content and promotion skills to accomplish top rating. White Hats techniques times to rating in search engines and avoid shortcut methods.
White Hats have their rewards as they can get more inbound links from other sites, because their content is widely appreciated as valuable.