What is an exploitation movie?

Exploitation film is a type of film that is promoted by "exploiting" often lurid subject matter. The term "exploitation" is common in film marketing, used for all types of films to mean promotion or advertising. These films then need something to exploit, such as a big star, special effects, sex, violence, romance, etc. An exploitation film, however, relies heavily on sensationalist advertising and broad and lurid overstatement of the issues depicted, regardless of the intrinsic quality of the film. Very often, exploitation films are of low quality in every sense. However, this has not always been the case. Exploitation films sometimes attract critical attention and cult followings.