If you have an Enterprise Portal, it's running on a web server. Ours, for example, is at maps.co.kendall.il.us. Everything after that in the URL is literally a folder or a file on our web adaptor machine.
Downloading an experience from Experience Builder Developer Edition gives you a folder, call it "my-experience". The contents of that folder have everything required to run your experience on a website. If I move that folder to the directory web-adaptor-machine/inetpub/wwwroot/apps/, then visit the site maps.co.kendall.il.us/apps/my-experience, I will be able to access that experience.
- Josh Carlson
Kendall County GIS