UPC stands for Universal Product Code, and they're meant for quick ID by computers and make it easier for inventory, organization, and sales. In USA we use UPC-A, and you can get them from the GS1 website, for about $30 each. You can get them from other websites but they can be sketchy They are vital for Amazon listings - they're the first thig you need to input If you have different variations for your products you'll need to buy different UPCs for each. You can buy them in bulk for a little ch