marketplace seller is anyone who lists products on Amazon’s marketplace for sale. To become a marketplace seller, you need to register for an Amazon seller account, choose your selling plan, and start listing your products. As a marketplace seller, you’ll have access to Amazon’s vast customer base, which includes millions of shoppers from around the world. You can choose to fulfill orders yourself, or you can use Amazon’s FBA service to handle storage, shipping, and returns. Being a marketplace seller comes with many benefits, including the ability to scale your business quickly, reach international customers, and leverage Amazon’s trusted platform for sales and marketing.