Billy Batson is a fictional character from the DC Comics universe, primarily known as the alter ego of the superhero Shazam. He is a young boy who can transform into an adult superhero by uttering the magic word "Shazam." This transformation grants him various powers, including super strength, speed, and the ability to generate electricity. Billy is often depicted as a kind-hearted and brave character who faces challenges typical of adolescence, such as bullying and family issues. His story emphasizes themes of responsibility and the importance of believing in oneself, making him a relatable figure for younger audiences.