The document discusses the use of titles and credits in movie trailers. Titles are often shown at the end of the trailer to leave a lasting impression. Credits acknowledge those involved in making the film, particularly the director. Reviews and details about the director/actors are meant to attract audiences and give them a sense of whether they will enjoy the film. Production companies are usually featured at the beginning to promote their involvement. The purpose is to provide just enough information through titles and credits to intrigue audiences and create "enigmas" about the film's plot and story without revealing too much.