A charm is something that can help you do things better than if you were trying to do it yourself by hand. If you wanted to clean something thoroughly, you could use a charm to help you do so. It is also handy when you want to cook, bake or decorate. I have seen my mother's servants use charms to make things float and fly. I would like to learn a charm to help me read foreign languages. I don't know if that's a thing, but I feel like it would be quite handy.