Portswigger labs exploit server

Recently I've done some portswigger labs on reflected xss and encountered exploit server which was used to deliver xss. You would have /exploit endpoint which you would use to upload html to target. How would exploit server would look like in real life scenario? Is it some kind of virtual private server VPS?

cybersecurity endpoint exploit html kind labs life portswigger private real reflected xss scenario server target upload virtual vps xss