The document discusses conventions used in movie trailers to convey information to audiences. It uses the trailers for the movie "Warm Bodies" to illustrate these conventions. The full trailer establishes the movie has genres of supernatural horror, comedy, action, and romance through visual cues like makeup, facial expressions, and editing. The teaser trailer similarly conveys genres of action, romance, and supernatural horror through fast pacing, violence, and relationship progression. Both trailers use non-diegetic sounds to enhance enjoyment and set expectations, but the teaser focuses more on violence and sexuality while the full trailer provides more context.