As the name implies, the GTIN helps automate the trading process – basically buying and selling. GTINs are therefore assigned to any item (product or service) that may be priced, or ordered, or invoiced at any point in any supply chain. The GTIN is then used to to retrieve pre-defined information about the item.
More Information on GTIN.
Locate enterprise by information appearing in the barcode placed on trade item or consumer unit: