Film genres can be categorized based on similar techniques, conventions, themes, and elements. The document discusses several common film genres - action, comedy, horror, romance, crime, and children's films - and summarizes their typical target audiences. Action films usually target young adult males who enjoy thrills and excitement. Comedy film audiences vary depending on the content but often include families. Horror film viewers are typically ages 13-25, especially younger males, while romance films target teenagers and older females. Crime films target older males who enjoy violent scenes. Children's films aim for ages 5 and up since they feature animation and fantasy.