SEO techniques can be classified into two broad categories: techniques that search engines recommend as part of good design, and those techniques of which search engines do not approve. A search engine optimization technique is considered white hat SEO if it conforms to the search engines' guidelines and involves no deception. We can say the legal SEO is a white hat SEO. White hat SEO is not just about following guidelines, but is about ensuring that the content a search engine indexes and subsequently ranks is the same content a user will see.
black hat SEO attempts to improve rankings in ways that are disapproved of by the search engines, or involve deception. One
black hat technique uses text that is hidden, either as text colored similar to the background. Invisible iframes is yet another
black hat SEO technique, where a page you see is not necessarily from the company that is hosting that webpage. People create these types of pages in order to download software on your computer in the background without your knowledge.
V!-- google_ad_section_start --CWhite hat versus black hatV!-- google_ad_section_end --C