I hung them on my office door, and on our outside doors. Whenever someone goes through these doors, the bells gently chime. It always puts a smile on my face.
Turns out, it’s feng shui. In particular, a bell on your main door, tied with a red ribbon, brings money luck into your house. The noise of bells can also help control bad chi energy, especially when you choose the materials carefully– metal or ceramic, crystal or wood. While feng shui states that you should hang bells on only the main door, I like having the small chime ring whenever I enter or leave the house, by any door.