Realtors love QR codes. It is like a fever that is sweeping the country. The QR code — basically a next-generation bar code — was invented in Japan in 1994.
A QR code (QR is short for "quick response") can be read by camera-equipped smart phones via an app. The codes are handy because it is faster and easier to scan a code into a phone than it is to type a Web address. QR codes have also been called "mobile tagging".
At the recent NAR convention in New Orleans, QR codes were all the rage. NAR used them on printed materials, and so did some of the vendors. I met Realtors who have them on business cards.