what is elf on the shelf mean

Elf on the Shelf is a holiday tradition where Santa's elves visit children's homes during the month of December and report back to Santa about the children's behavior. They're not here to judge, but to help Santa make a list of good and bad kids. The elves move around the house each night, so children are always on their best behavior. It's a fun way to get kids excited about the holiday season and remind them to be good!