When a dynamic QR code is created, a short URL is generated in turn. This link is what makes the QR code recyclable and trackable.
It also means that you can have people scan your QR code to access its content and also share that content on the web using the short URL.
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 (c109) is a random alhpanumeric string. Both parts can be customized.
If you want to know how to customize the QR code or its landing page, check the following articles: