Retail design is when people make a store look really nice and interesting so that you will want to go in and buy things. They think about things like where to put the shelves and how to light the store so that you feel happy and comfortable while you are shopping. They also make the outside of the store look pretty so that you will want to go inside. The people who do retail design want to make sure that you have a fun time while shopping and that you want to come back again.