Qr codes and how they work.

First all you should know that, you will need a smart phone.
For the iphone or ipod download an app called Qr Scanner / reader
you then hold your phone up to the qr code, and scan it with the app from your iphone.

if you want a free site to generate Qr codes that actually work try www.Qrcode.kaywa.com,  just type in the web address that you have and click generate.