What is the url scheme field and build settings looking for?

What format is the url scheme field in build setting looking for? I am just trying to understand the structure and how to create an url scheme.

take a look here

these are the kinds of schemes you can have

So, for example, what would I enter if my app is called wikacy-reels? Does it have to be the same as the package name? Or could I pattern it after the domain the web version is hosted on, wikacy.web.app ?

And obviously can’t use tell: and mail:. :thinking:. Right? The url scheme for the app should be an Android url scheme, correct?