Flutter uses a navigation stack where Navigator.push returns a Future that completes when the new route is popped. You can use this to retrieve data returned from the second screen. When you're done with the second screen, calling Navigator.pop(context, result) pops it and sends back the result to the previous screen, which can then handle it using await. This approach is clean, idiomatic, and works well for tasks like selections, form submissions, or confirmations.