The document outlines the British Board of Film Classification (BBFC) guidelines for classifying films into different age ratings. It provides details on what content is acceptable for U, PG, 12A, 12, 15, and 18 rated films. For example, a 15 rated film may contain moderate violence without dwellling on details, as well as frequent strong language. The document explains that the filmmakers are targeting their horror film/trailer at 15-18 year olds, so they aim to meet the criteria for a 15 rating to allow their target audience to view it in cinemas.