Whats a QR Code you may ask ?
A QR code (abbreviated from Quick Response code) is a type of matrix barcode (or two-dimensional code) The code consists of black modules arranged in a square pattern on a white background. The information encoded can be made up of any kind of data (e.g., binary, alphanumeric, or Kanji symbols). It is a simple square barcode
This is ideal for anyone wanting to get a user to visit a website, using a smartphone
For an example of a QR code, have a look at