<human>:  How did the Beatles become so popular?
<bot>: The Beatles became popular due to their unique style of music, which combined elements of rock and roll, as well as pop, psychedelia, and other genres. They also became well-known for their innovative recording techniques and songwriting abilities, which added to their appeal and helped them gain fans around the world. Additionally, the Beatles benefited from their creative use of marketing, which allowed their songs and albums to reach an ever-expanding audience.