QR code is a kind of barcode that can be used to store information about the product for which it is designed. This information can be stored in a number of different formats, including text, numbers, and even symbols.

To make sure that the information is accurate, QR code is usually checked by the manufacturer or the retailer who creates it. If the code is valid, it can be used to get information about the product, which in turn can help consumers check the product's quality or help the retailer improve their business.

To scan QR code, you need to have a smartphone with a built-in camera.