Identify the barcode type
Scan the barcode with a barcode scanner or smartphone app
Read the digits printed below the barcode
Match the digits to the product or item record
Check the first few digits for manufacturer or country code, if applicable
Check the middle digits for product identification, if applicable
Check the last digit for the check digit, if applicable
Verify the number against a database or inventory system
Use the barcode standard to interpret the number correctly
Confirm whether the barcode is UPC, EAN, Code 128, or another format