FNSKU
Fulfillment Network Stock Keeping Unit - A unique barcode that Amazon assigns to FBA inventory to track products in their fulfillment centers. FNSKUs are specific to each seller's account, preventing commingling of inventory from different sellers.
Related Terms
FBA
Fulfillment by Amazon - A service where sellers send their products to Amazon's fulfillment centers, and Amazon handles storage, packing, shipping, customer service, and returns. FBA products are eligible for Prime shipping and typically have higher conversion rates.
SKU
Stock Keeping Unit - A unique identifier that sellers create for their own inventory management. Unlike ASINs (which are Amazon-assigned), SKUs are created by the seller and can include information about the product variant, supplier, or purchase date.