Making effective QR codes takes work. To shortcut the amount of learning and work required, you can look at how others are using QR codes. By using the best techniques you find and avoiding the worst problems, you can make your QR codes be the best they can be.
Today we look at a QR code found on the back of a Heinz Ketchup bottle. The code is about 1 1/4″ square and has both a call-to-action and a URL listed.