Can we us Flutter's Google mobile ads package for showing ads except admob in Flutter

First, we need to install Flutter SDK with the following command:

$ sudo snap install flutter --classic

After that, we need to enable desktop development mode:

$ flutter config --enable-<platform>-desktop
// <platform> = linux, windows, macos

Like any other typical CLI, we can create a new application with the create command as shown below:

$ flutter create desktop-app

The lib/main.dart file contains the main source code of your application. Let’s modify the main source code as shown below to create a simple “Hello World” application:

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'TextPad',
      theme: ThemeData(
        primarySwatch: Colors.green,
      ),
      home: Scaffold(
        body: Center(
          child: Text('Hello World')
        ),
      ),
    );
  }
}

After editing the main source file, enter the following command to run your application:

$ flutter run -d <platform>
// <platform> = linux, windows, macos

Similar to the previous Hello-World application, add the following source code into the main application source file:

import 'dart:io';
import 'package:flutter/material.dart';


void main() => runApp(MyApp());

class MyApp extends StatelessWidget {

    final textController = new TextEditingController();
    final globalKey = GlobalKey<ScaffoldState>();
    final String fileName = 'textPadNote.txt';

     Future<void> _exportToFile(BuildContext context) async {
       final File file = File('${Directory.current.absolute.path}/${fileName}');
       final snackBar = SnackBar(content: Text('Saved to: ${file.path}'));

       await file.writeAsString(textController.text);
       globalKey.currentState.showSnackBar(snackBar);
    }
  @override
  Widget build(BuildContext context) {

    return MaterialApp(
      title: 'TextPad',
      theme: ThemeData(
                brightness: Brightness.dark,
           ),
      home: Scaffold(
        key: globalKey,
        appBar: AppBar(
          title: Text('TextPad'),
          actions: <Widget>[
              IconButton(
                    icon: const Icon(Icons.save),
                    tooltip: 'Export to ${fileName}',
                    onPressed: () {_exportToFile(context);}
                  )]
        ),
        body: Center(
          child: TextField(
                controller: textController,
                maxLines: null,
                keyboardType: TextInputType.multiline,
                expands: true,
                  decoration: InputDecoration(
    hintText: 'Play with your notes here...',
    contentPadding: EdgeInsets.all(12.0)
  ),
          ),
        ),
      ),
    );
  }
}

When we are debugging the application, debuggable binaries will be created. However, debuggable binaries are not optimized for a release. Execute the following command on the terminal to make optimized binaries:

$ flutter build <platform>
// <platform> = linux, windows, macos