Open the QR Code reader on your phone or tablet [device].
Hold your device over the QR Code so that it’s clearly visible within your device's screen. Two things can happen when you correctly hold your device over a QR Code:
a) The device automatically scans the code.
b) On some readers, you have to press a button to snap a picture, not unlike the button on your smartphone camera.
Presto! Your smartphone reads the code and navigates to the intended destination. This may take a few seconds on most devices.