Answer:
QR stands for Quick response codes
Step-by-step explanation:
QR defined as the Quick response code, which is a kind or the type of the barcode, that is only read by the digital device and the stores information.
It is used in order to track the information regarding the products and mostly used for the campaigns of advertising and marketing.
Therefore, the target post signs in the posts and the stores, the QR codes on the products.