very simply.. White Hat is something that is done naturally and manually and black Hat is something that is done to get results in short time mostly by using automated software.. however, the result is not always favorable...
White Hat SEO : Refers to the usage of SEO strategies, techniques and tactics that focus on a human audience opposed to search engines and completely follows search engine rules and policies. For example, a Web site that is SEO optimized, yet focuses on relevancy and organic ranking is considered to be optimized using White Hat SEO practices. Some examples of White Hat SEO techniques include using keywords and keyword analysis, backlinking, link building to improve link popularity, and writing content for human readers White Hat SEO is more frequently used by those who intend to make a long-term investment on their Web site. Also called Ethical SEO. Black Hat SEO Refers to the use of aggressive SEO strategies, techniques and tactics that focus only on search engines and not a human audience, and usually does not obey search engines rules.Black Hat SEO can possibly result in your Web site being banned from a search engine