The term Expanded Universe refers to the collection of stories, characters, and settings that exist outside the main narrative of a fictional franchise, often expanding on the original material. This concept is prevalent in various media, including Star Wars, Star Trek, and Marvel Comics, where additional books, comics, and games explore new adventures and backstories of beloved characters. These supplementary works allow fans to delve deeper into the lore and mythology of their favorite universes, providing a richer experience. The Expanded Universe can also introduce new characters and plotlines, creating a more intricate tapestry of storytelling that enhances the overall franchise.