Genre refers to the type or kind of film, and is determined by who categorizes the film, for whom, where, and when. Genres are defined by expectations set up around them, but can be difficult to define as films may contain elements of multiple genres, and audiences recognize genres in relation to other genres rather than real-world definitions. To understand genre, one must consider how filmmakers communicate genre to audiences, how audiences interpret genres based on expectations, and be able to identify genre codes, conventions, and elements within films.