Amazon UPC is nothing but a unique code assigned to each product on the Amazon marketplace. It is done to clearly distinguish the said item from the millions of others already existing in the online market. UPCs make it easy to identify individual products sold on Amazon across the world. Think of it as Amazon’s system to separate each product in its database.
These codes work in the same way as the barcodes you see on every product in your local supermarket. They are unique, and a simple scan will tell you what the product is, along with other relevant information.