Crossovers refer to the blending of different genres, characters, or storylines from various media, such as movies, television shows, or comic books. This concept allows creators to explore new narratives by combining elements from distinct universes, often leading to unique and engaging experiences for audiences. For example, a crossover might feature characters from Marvel and DC Comics interacting in a shared storyline. In the realm of television, crossovers often occur when characters from one show appear in another, creating excitement and drawing in fans from both series. Popular examples include The Arrowverse, where characters from different superhero shows like Arrow and The Flash come together, enhancing the overall storytelling and expanding the universe.