black hat SEO
A set of techniques that is used to get higher search rankings in an unethical manner and designed to obtain short-term gains in terms of search rankings. If discovered, the use of this technique carries the risk of being penalized by search engines. Some examples of black hat SEO techniques include keyword stuffing, invisible text, and doorway pages. Spamdexing is a typical frequently used black hat SEO practice. See also white hat seo.