Fictional brands are made-up companies or products that exist within stories, movies, or television shows. They are created to enhance the narrative and provide a sense of realism to the fictional world. Examples include Krusty Krab from SpongeBob SquarePants and Duff Beer from The Simpsons. These brands often reflect real-world trends and consumer culture, allowing audiences to connect with the story on a deeper level. They can also serve as a form of satire or commentary on actual brands and marketing practices, making them an interesting aspect of storytelling in various media.