"Santa Claus Is Coming to Town" is a popular Christmas song that tells the story of Santa Claus, a jolly figure who brings gifts to children around the world. The song emphasizes the importance of being good, as Santa keeps a list of who has been naughty or nice. The lyrics describe how Santa travels from the North Pole, spreading joy and cheer during the holiday season. The song has become a festive classic, often played during Christmas celebrations and featured in various holiday movies and television specials.