The document discusses several key conventions and factors of movie posters, including:
1) The title is usually the largest text and features an eye-catching, bold font that relates to the genre.
2) The main image typically features an action scene or character that creates mystery and intrigue.
3) Simplistic reviews and star ratings are used to hype up and promote the film.
4) An age rating provides viewers information about the film's content and intended audience.