Because that’s how they keep track of your products. If you had a store without any UPC codes it would be impossible to keep track of the inventory and it would be even harder to keep up with the product pricing. These barcodes are used for product information, pricing information, and inventory control. You can even use UPC Barcodes to keep track of the inventory in your own warehouse.When you are purchasing UPC Barcodes it is always better to purchase extra numbers to have on hand. UPC Barcodes do not have an expiration date nor do they have to be used within a certain timeframe. They can be kept and used when you are ready. When you purchase UPC Barcodes from Speedy Barcodes all of your numbers are issued in sequential order.