A trailer is a short promotional video, typically 2 to 3 minutes long, that showcases key scenes from a film to attract an audience. Trailers are crafted to engage target demographics and are influenced by narrative structures like Todorov’s theory, which includes stages of equilibrium and disruption. Marketing strategies for trailers leverage music, visual aesthetics, and social media to enhance viewer interest and set the tone for the film, with careful consideration of release dates and audience certification.