A sample QR code
In short, a QR (quick response) code is a two-dimensional barcode. They hold more information than the barcodes scanned at the supermarket. Here’s a link to a more detailed explanation of QR codes.
Almost all modern smartphones or tablets can scan a QR code. You can use your camera app or install a QR code reader app (more info below). Open the app, and point your device’s camera at the QR code. The reader will scan the code and take you to the link contained in the code. It’s that simple!
There are several free or low-cost QR code reader apps for every kind of mobile device. Go to the appropriate app store for your phone and search for “QR code reader” if you can’t use your camera app. Choose one to install and you’ll be ready to go!