What's a QR code and why have one? QR is short for quick response. A QR code is a black and white two-dimensional bar code that can be read by bar code readers and cellphones that have code-reading apps.
QR codes can be used to embed all sorts of information and in many cases, a web address. All one has to do is scan the code and the information embedded is transferred to one's phone.
So why have one? Why not?
Here's my QR Code: