what is a elf on a shelf meaning

An elf on a shelf is a mischievous and playful Christmas tradition where a small elf toy is placed in a home to watch over children and report their behavior back to Santa. The elf is meant to be a friendly and caring companion who helps spread Christmas joy and keep an eye on the children's behavior. As part of this tradition, the elf moves around the home every night to entertain and surprise the children, sometimes doing funny things or playing tricks on them. In return, the children are encouraged to behave well and be kind to one another.