Popmaster is a popular music quiz show that airs on BBC Radio 2. Hosted by Ken Bruce, the show features contestants answering questions about various music genres, artists, and songs, testing their knowledge and quick thinking. The format includes a series of rounds, with the final round known as the "Popmaster" test, where contestants can win points based on their answers. The show has gained a loyal following due to its engaging content and the host's charismatic style, making it a staple for music lovers and quiz enthusiasts alike.