GTIN (Global Trade Item Number) is a unique and standardized product identification system that is used to identify trade items, products, and services in a global supply chain. The GTIN is a globally recognized unique identifier for products that is used by companies to keep track of their products as they move through the supply chain, from production to point of sale.

GTIN is a family of barcode symbologies that include the EAN/UPC, ITF-14, GS1 DataBar, and GS1-128. Each of these barcode types is used to represent different types of products and packaging.

The GTIN is assigned to a specific product or service by the manufacturer, who is responsible for ensuring that each product has a unique GTIN. The GTIN is then encoded in a barcode or other machine-readable format, which is used to identify the product throughout the supply chain.

The use of GTINs enables companies to efficiently manage their inventory, track products, and provide accurate product information to their customers. This system helps to reduce errors, improve product traceability, and enable faster and more efficient supply chain operations.

The GTIN is managed by GS1, a not-for-profit organization that develops and maintains global standards for a range of industries. The GS1 system is used in more than 150 countries and is widely recognized as the global standard for product identification and supply chain management.