Amazon FBA (Fulfillment by Amazon) is a service offered by Amazon that allows third-party sellers to store their products in Amazon's fulfillment centers, and the company handles the shipping of the products to the customer. Sellers using Amazon FBA can offer Prime shipping to their customers, which can be a key factor in attracting and retaining customers. Amazon FBA also handles customer service inquiries and returns for the seller. There are fees associated with using Amazon FBA, which can vary based on the size and weight of the product, as well as the seller's monthly storage fees. Some sellers find that using Amazon FBA can help them save time and reduce the overhead costs of fulfilling orders themselves, while others prefer to handle fulfillment in-house.