Seller is a person who sells goods or services to customers. The seller may be an individual, a business, or another organization. In sales, a seller is a party that makes sales through some means of exchange. The seller may sell goods or services. Sales is one of many functions in the marketing area of a business. A seller can operate as an individual or part of a company. A seller may also be self-employed.

The seller is a role in the drop shipping business, where they are responsible for buying and selling products at a wholesale level to be sold online. They are not responsible for shipping the products or handling customer service.