A QR Code is a matrix barcode, they have been around for some time and are catching on more and more.
What you need is a camera or app on your iphone, android phone to read it and convert the image to link, text message, phone number or website.
My recommended apps for IPhone and Android is the same app, very fast and works well.
Download and try NeoReader: IPhone, Android
Try this one out and see what you get