I have been seeing these codes everywhere lately and decided to investigate. I found the best explanation here..http://www.socialmediaexaminer.com/how-qr-codes-can-grow-your-business/ I think they are used mostly by the younger generation, but i think they will become part of our life. We are lazy creatures by nature, and these replace having to type in web addresses etc into our smart phones or tablets. I have found the best use is in print media, for example on the back of your business card. This way the customer can put your web address into their smart phone, ipad or tablet with ease. All phone and tablet platforms have barcode scanner apps for free. Here is a link to the page where you can create your own qr codes http://qrcode.kaywa.com/
Here is the qr code for the leatherworkers.net
cheers