Film trailers are short previews of movies used to promote and market films. Trailers give audiences a glimpse of what to expect from a film in order to entice them to watch it. Trailers showcase exciting footage and are tailored to different genres to appeal to specific audiences. They are shown in theaters, on DVDs, television, and increasingly on digital billboards. Effective trailers use pacing, music, dialogue, and editing techniques to match the genre and build suspense leaving audiences wanting more information and eager to see the full film.