A trailer is a short promotional video that showcases highlights from a movie, television show, or video game. It is designed to generate interest and excitement among potential viewers by providing a glimpse of the storyline, characters, and visual style. Trailers often include key scenes, dramatic music, and voiceovers to capture the audience's attention. Trailers are typically released before the official launch of the media they represent, often appearing in theaters, on television, or online. They serve as a marketing tool to attract audiences and can vary in length, usually ranging from one to three minutes. Many trailers are accompanied by promotional posters and social media campaigns to enhance visibility.