Movie genres are categories that help classify films based on their themes, styles, and storytelling techniques. Common genres include action, comedy, drama, horror, and science fiction. Each genre has its own unique characteristics, such as the use of suspense in horror films or humor in comedies, which guide viewers in choosing what to watch. Genres can also blend together to create sub-genres, like romantic comedy or action-adventure. This blending allows filmmakers to explore different storytelling methods and appeal to a wider audience. Understanding movie genres can enhance the viewing experience by setting expectations for the film's tone and content.