If you are a business owner, youcan work with Amazon in two different ways. You can work as a vendor or a seller. A seller is a retailer that sells directly to the consumer. 

A vendor, on the other hand, has a relationship with Amazon and sells to Amazon directly. This is more of a wholesale relationship. Amazon, then, sells to the end buyer of the product. In this relationship, Amazon purchases items from the vendor at a discounted or wholesale price in bulk. The products are received and organized in warehouses to meet demand, and then Amazon fulfills orders.