Padding From all side

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      title: 'Flutter Demoooooo',
      debugShowCheckedModeBanner: false,
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  const MyHomePage({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        backgroundColor: Colors.cyan[100],
        appBar: AppBar(
          title: const Text("Flutter margin padding"),
          backgroundColor: Colors.blueAccent,
        ), //appbar
        body: Padding(
          padding: const EdgeInsets.all(8.0),
          child: Text('Hello Students'),
        )

    ); //scaffold
  }
}