Fulfillment by Amazon (FBA) is a service provided by Amazon that allows sellers to store their products in Amazon's warehouses. When a customer orders a product, Amazon handles the packing, shipping, and customer service on behalf of the seller. This helps sellers reach a larger audience while minimizing their logistical responsibilities. Using FBA can enhance a seller's visibility, as products fulfilled by Amazon are often eligible for Amazon Prime and other benefits. Sellers pay fees for storage and fulfillment, but many find that the convenience and access to Amazon's vast customer base outweigh the costs.