what is the elf on the shelf mean

The elf on the shelf is a popular Christmas tradition where a small elf doll is placed in the home as a way to keep an eye on children's behavior during the holiday season. The elf is believed to report back to Santa every night about the child's behavior, and good deeds are rewarded with treats and gifts, while bad deeds are met with a warning or punishment. The tradition is intended to encourage children to be on their best behavior in the lead up to Christmas.