what is fba and fbm in amazon describes two different fulfillment methods available to Amazon sellers. Fulfillment by Amazon (FBA) means the seller’s products are stored in Amazon’s fulfillment centers, and Amazon handles the fulfillment process. Fulfillment by Merchant (FBM) means that the seller is responsible for storing, packaging, and shipping their products directly to customers. FBA offers the convenience of outsourcing fulfillment, while FBM gives sellers more control over their inventory.