The Motion Picture Association of America's film-rating system is used in the U.S. and its territories to rate a film's thematic and content suitability for certain audiences. The MPAA rating scheme applies only to films submitted for rating. The MPAA rating system is a voluntary scheme not enforced by law; and films can be exhibited without a rating, though many theaters refuse to exhibit non-rated or X-rated films. Non-members of MPAA may also submit films for rating. Other media (such as television programs and video games) may be rated by other entities. The MPAA rating system is one of various motion picture rating systems used to help parents decide what movies are appropriate for their children.
In the United States, the MPAA rating scheme is the most-recognized guide for parents regarding the content of films and each rating has been trademarked by MPAA so that they cannot be used by other organizations. The MPAA system has been criticized for the secrecy of its decisions as well as for perceived inconsistencies.