Amazon Barcode FBA refers to the barcode labeling requirement for products shipped to Amazon’s fulfillment centers under the Fulfillment by Amazon (FBA) program. Amazon uses barcodes to track inventory and ensure that items are properly sorted and shipped to customers. Sellers are required to print and apply these barcodes (usually Amazon’s FNSKU barcodes) to their products before sending them to Amazon. This helps Amazon efficiently manage and fulfill orders, ensuring the correct products are shipped to the right customers.