Final answer:
Movie posters serve the purpose of promoting a movie by using eye-catching visuals, taglines, and actor images to generate interest in the film.
Step-by-step explanation:
The purpose of a movie poster is to promote the movie. It is designed to catch people's attention and generate interest in the film. Movie posters often use striking visuals, captivating taglines, and images of the main actors to entice people to watch the movie.
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