I'll admit I'm not exactly doing a great job of selling it on that page, but this is what other QR sites refer to as a 'dynamic' code that you can change the destination of and see how many people have scanned it, etc. It is essentially a link shortener/redirect service in addition to the QR code itself.

You could, for example, run marketing campaigns and change the destination of the QR code for each subsequent campaign, and see their performance.