Any text or number, like a stock code, parcel number or ID.
SVG stays sharp at any size, which is best for printing labels.
Selling in shops? An EAN-13 or UPC-A number has to be registered to your business with GS1 India. This app draws the barcode for a number you already have. For your own stock labels, parcels and IDs, use Code 128.
Read the guide: barcodes for products in India