Answer:
They label food as safe.
Explanation:
QR Codes are used as a marketing strategy to attract people into buying the product. Once an item has a QR Code, the customer will be able to know (through his mobile phone's QR-Code scanner) different information about the food such as its nutritional contents, how the food was handled, and so on. It will also tell the person about the food's expiration date, thus, he/she will know the food's shelf-life and that it is safe to eat. It also "prevents food wastage."
