Help - System URI
A System's URI is part of its unique Viewer link. This means that if you publish or email the URL for your Viewer and then change it, those links will no longer work.
The text in bold below is the part of the complete link to your System's Viewer that changes:
In other words, every system has a link that looks like the above, but none of them have the same text to the the right of the final slash.