The major elements of a film marketing campaign are trailers, posters, viral marketing, and magazine features or reviews. Trailers are short clips from the film shown to generate interest, while posters visually advertise the film. Viral marketing uses websites and social media to target audiences. Magazine features provide overviews and critics' reviews of films. Trailers are commonly shown in cinemas before films of similar genres, on television during commercial breaks tailored to certain audiences. Posters advertise in theaters, on billboards, and at bus stops. Magazines advertise films matching their readers' interests. Viral marketing uses social media sites. Reviews on websites and in magazines influence viewers.