The document discusses film trailers and how they are used to market upcoming movies. Trailers are previews that aim to entice audiences by showing the best parts of the film and featuring famous characters. They are released in theaters, on television, and online in order to generate widespread awareness of the new film. Effective trailers work to pique viewers' interest in a unique way and hint at the film's genre through elements like music, emotions, and costumes. The Battleship trailer discussed was leaked early enough to build excitement leading up to the film's release.