And just to be more confusing, there are "consignment shops". Generally, these shops accept only designer brand clothes in season. You bring in a pile, and the shop tries to resell it and gives you a percentage of the profit. It's not meant to be a charity, and all those workers are paid. Some specialize in baby things, children's clothes, teenage girl things, etc.
I used to use one in my hometown for baby things, but it's easier now for me just to donate to a charity shop.