The document discusses the horror genre and its various subgenres. It defines the purpose and conventions of the main horror genre, which is to scare audiences. It also outlines several classic horror films that helped establish the genre. Additionally, it examines several horror subgenres like comedy horror, supernatural horror, and documentary horror. It provides examples of films for each subgenre and discusses their purposes, such as providing humor to fears for comedy horror or realism for documentary horror. It also notes that the horror comedy subgenre was established in the 1920s to appeal to broader audiences by adding humor.