If you are in need of groceries, clothes, stationary or other items, your brain can trigger a dream about shopping.
If you need to buy something for another person, your brain might have triggered this shopping dream, to remind you to buy something to do that task.
If you do not need physical items, but still dream of shopping, it means your brain is trying to tell you another message. You might need intangible assets, which your brain tries to tell you, by inventing a dream going shopping. You need to obtain the qualities that you’re lacking in.