What is a QR Code?
QR is short for Quick Response (they can be read quickly by a cell phone). They are used to take a piece of information from a transitory media and put it in to your cell phone. You will see QR Codes in magazine advertisements, on a billboards, on web pages or even on t-shirst. Once it is in your cell phone, it may give you details about that business (allowing users to search for nearby locations), or details about the person wearing the t-shirt, show you a URL which you can click to see a trailer for a movie, or it may give you a coupon which you can use in a local outlet.
Here is an example:
QR Code Special - $75.00
Example of how the above QR Code gets read: