Barcodes have two parts – the unique number and the graphic.
A barcode number (aka, a GTIN - Global Trade Item Number), is the globally unique number you assign to your product.
You’ll need unique barcode numbers for each product as well as the carton/case they come in, and your logistics units such as a pallet (now required by supermarket retailers). Find out more about logistics labelling using Serial Shipping Container codes.
Once you’ve assigned a barcode number to your product, it provides a common language that all your trading and supply chain partners can use both here and globally to uniquely identify the item and easily share its data.
Once you have your barcode number (GTIN), you’ll need to create a barcode graphic.