Every App has a unique ID. You use App IDs to specify which app you want to use or modify.
You can find your Project ID in the App Services UI or use the Admin API or App Services CLI to find it programmatically.
Every App is associated with a single Atlas project. You use the project's unique Project ID value, sometimes referred to as a "Group ID", to identify and work with your App programatically.
You can find your Project ID in the Atlas UI or use the Atlas Admin API or Atlas CLI to find it programmatically.