Have you ever asked yourself how Amazon knows what product belongs to which seller, where each product is stored, or how much stock each merchant has at any given moment? From manufacturing of Products to storing stock in Amazon warehouse, there are different kinds of Barcodes used on Amazon products , like GTIN, UPC, EAN, ASIN, FNSKU & SKU. There usage may confuse & trip up new seller. But after reading this post, you can easily understand differences between them. There are 2 types of Barcodes used in different stages, Barcodes that only Amazon uses & Universal Barcodes. Barcodes That Only Amazon Uses: These Amazon-only barcodes are used for internal purposes such as inventory management, shipping, etc. ASINs: Amazon Standard Identification Numbers are 10 alphanumeric digits that are automatically assigned to an Amazon listing when it is created. Hence many people refer to listings and ASINs or vice versa. ASINs are Amazon's way of identifying a listing/product on the...