The document discusses different types of film posters and their conventions. Thriller posters focus on main characters with dark color schemes and serious expressions. Horror posters provide clues about the film's events and have gloomy images. Comedy posters show comical character expressions and taglines. Action posters feature heroic main characters against background settings and often include weaponry. Posters are displayed publicly to promote films and attract wide audiences through mysterious images, fonts, and colors that intrigue viewers. Release dates, credits, taglines, and images of key characters or objects are typical poster conventions that may differ based on genre.