Genre refers to categories of films based on similar narrative elements, themes, settings, and character types. Examples include action, crime/drama, comedy, horror, romance, and science fiction. Hybrid genres blend two or more genres, like romantic comedy. Sub-genres branch out from main genres with variations, such as dark comedy or slapstick comedy. Genres help audiences understand and find films they will enjoy, and help producers target marketing and anticipate success. However, genres are not fixed and evolve over time as social contexts and audience tastes change.