RESEARCH: What is a Film Trailer?

According to IMDB's terminology glossary, a film trailer is "an advertisement for a movie which contains scenes from the film". You can also have teaser trailers which are basically the trailer before the official trailer. They are normally shorter in length and give audiences a sneak preview of the film that is going to be released in many months time. The trailers are usually the main form of advertisement for a movie as they can be shown on so many different forms of media such as television, in the cinemas itself, on the internet, through social media etc.