Queries about native app builder

Hello I was wondering what is app identifier and runtime url means in the CLI below documentation  https://docs.mendix.com/howto/mobile/deploying-native-app
1 answers

The app identifier is the unique name that you give it. Usually the domain name in reverse, without the subdomain: com.mendixcloud

The runtime url is the url that your native app will use as it’s backend server. So if you want your app to talk to the test-environment, add the url of your test-environment, with the protocol (https://). For instance: myproject-test.mendixcloud.com