The short URL is what allows a dynamic QR code to be recyclable and trackable. You can use the short URL to share the content of the QR code on the web.
This is what a default uQR.me short URL looks like:
The part before the slash (uqr.to) corresponds to the domain. The part after the slash (qr-name) is a random alhpanumeric string that is generated automatically. Both parts can be customized.