"What is a QR code? It's short for "Quick Response" and is usually a square. What do you do with a QR code? When you see one, you can use your smartphone or any mobile device with a camera, QR code reader app and internet access to scan the square. Once you scan it, the code will take your device to the web-based location set up by the code creator. You need to know though that they are two kinds of QR codes. Dynamic QR codes let you change or update the URL linked to it without creating a new QR code. Static QR codes are linked to a fixed URL that cannot be changed."