Dropshipping involves selling products from an online store without having any product in stock. They are instead sent by a distributor, and you make profit by selling at a higher price. Affiliate marketing is similar in that you don’t keep products in stock. But the real difference is that affiliate marketing does not require the affiliate to deal with customer supporter anything to do with the sales process. The company behind the affiliate program handles all of that, and all you need to do is refer sales.