Film trailers typically include several conventions to attract audiences. They usually begin with the production company logo to establish reputation. This is followed by the film title at the end to ensure viewers remember it. Age certification is also displayed to indicate appropriate audience. Trailers also increasingly include social media promotions. Character introductions are important to help audiences relate and connect to the story. Music, voiceovers and montages are utilized to build tension and immerse viewers in the film's atmosphere and genre. Trailers come in different lengths to generate hype, with full trailers usually between 1-2 minutes.