The document compares and contrasts teaser trailers and full theatrical trailers. Teaser trailers are shorter, around 30 seconds to 1 minute, and reveal very little information about the plot or characters. They are aimed at enticing specific target audiences and leaving viewers with questions. Full trailers are longer, around 3-4 minutes, and provide more details about the story, characters, and setting to further promote the film. The document provides examples from the teaser and full trailers for The Blair Witch Project to illustrate these differences.