Amazon has one of the most advanced fulfillment networks in the world. Fulfillment by Amazon (FBA) helps you increase your online sales by giving you access to Amazon's world-class fulfillment resources, fast, free delivery options for. You sell it, we ship it. What is Amazon FBA? · You send your products to Amazon. The program allows sellers to ship their merchandise to an Amazon fulfillment center, where items are stored in warehouses until they are sold. Amazon FBA literally means Amazon Fulfilled-by-Amazon.