Global Trade Item Number (GTIN) can be used by a company to uniquely identify all of its trade items worldwide. GS1 defines trade items as products or services that are priced, ordered or invoiced at any point in the supply chain.

The GTIN can be encoded in a barcode or an EPC/RFID tag. By scanning the barcode or reading the EPC/RFID tag, companies can efficiently and accurately process products and related information; for example, at check out in a store, when receiving goods in a warehouse, and when administering medication in a hospital.