The GS1 System uses approved barcode symbologies to encode the identification numbers that uniquely identify trade items, logistic units, locations, assets, and service relations worldwide. Additional information such as best-before-dates, serial numbers, and lot numbers may also be encoded into barcodes.

Barcodes are machine readable, which are read by scanning. Scanning speeds data collection and eliminates manual data collection errors – illegible handwriting and data entry errors. The GS1 System enables users to design applications that automatically process GS1 data captured from approved barcode symbologies.