what is elf on the shelf do

Elf on the Shelf is a Christmas tradition that involves placing a small elf doll or figurine in a different location in the home each day, and the idea is that the elf is watching over children to ensure they're behaving well in the days leading up to Christmas. Each morning, children wake up to discover where the elf has been placed, and it's believed that the elf will report back to Santa with any naughty behavior he or she witnesses. It's a fun and playful way to engage children in the excitement and anticipation of the Christmas season.