Fulfillment by Amazon (FBA) is a service offered by Amazon to retailers, enabling them to store their products in Amazon's fulfillment centers. With FBA, sellers can leverage Amazon's robust logistics and shipping infrastructure. When a customer places an order, Amazon picks, packs, and ships the product on behalf of the seller. FBA also provides customer service and handles returns. This service streamlines the fulfillment process for retailers, allowing them to focus on product development and marketing while Amazon manages the operational aspects of order fulfillment.