Dear little one,
A door god is like a superhero who protects your home from bad spirits and ghosts who might try to come in. They are usually two fierce-looking guardians who stand at the entrance of your house, one on the left and one on the right.
People in some cultures believe that putting up door gods keeps their home safe and happy. The two gods help create a strong barrier that keeps any troublesome spirits from entering your home. So, when you are inside your house, you don't have to worry about anything bad getting in.
Many people celebrate a special day when they put up the door gods, usually during the Lunar New Year or other traditional holidays. They stick them up on the door using red paper - this color is known for fighting off bad spirits.
So, if you ever see a fierce-looking pair of guards at someone's door, remember that they're not there to be scary, but to keep bad ghosts away!