I use it to manage my subdomains, something like notes.mywebsite.com would point at my trillium instance while photos.mywebsite.com would point at my my immich container it has more uses but that’s my extent. I just have an instance of a cloud flare dns updater keeping my domain in sync with my ip so I don’t have to do that manually when it changes.

So in my scenario cloud flare is just part of my setup.