A genre is a category that groups together works of art, literature, music, or film based on shared characteristics or themes. For example, in literature, genres include fiction, non-fiction, mystery, and fantasy. Each genre has its own conventions and styles that help define the expectations of the audience. Genres can also evolve over time, leading to sub-genres that blend elements from different categories. For instance, science fiction can merge with horror to create sci-fi horror. Understanding genres helps audiences choose works that align with their interests and enhances their overall experience.