A QR Code is a two-dimensional bar code which stands for "Quick Response" and allows its contents to be decoded at high speeds.
This type of code can store more than a standard barcode by storing addresses and URLs in magazines, business cards, signs, etc.
QR Codes are now used in both commercial tracking applications and convenience-oriented applications aimed at mobile phone users (known as mobile tagging). Mobile tagging allows quick, customer-driven access to information.
QR Codes are accessed through the use of a smartphone camera equipped with the correct reader app to scan the image of the QR code that causes the phone’s browser to launch and redirect to a programmed URL. See visuals below.