Certificate ratings help ensure films are suitable for different age groups by classifying content. U is for all ages and contains no explicit material. PG allows mild language, violence, or themes parents may wish to consider. 12A/12 permits more violence but not in graphic detail along with limited sexual or discriminatory content. 15 allows strong language, more graphic violence, and brief sexual scenes. 18 has no content restrictions but is aimed at adults due to graphic depictions of violence, sex, drugs, and language. For her horror film, the author determines a 15 rating would allow sufficient graphic content while maintaining a large audience.