The TabBar widget in Flutter is used in combination with TabBarView to create a swipeable set of tabs, typically seen in apps to organize content or navigate between different sections.

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  final List<Tab> myTabs = <Tab>[
    Tab(text: 'Tab 1'),
    Tab(text: 'Tab 2'),
    Tab(text: 'Tab 3'),
  ];

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: DefaultTabController(
        length: myTabs.length,
        child: Scaffold(
          appBar: AppBar(
            title: Text('TabBar Example'),
            bottom: TabBar(
              tabs: myTabs,
            ),
          ),
          body: TabBarView(
            children: myTabs.map((Tab tab) {
              // Replace this with the content for each tab
              return Center(
                child: Text(tab.text ?? 'No text provided'),
              );
            }).toList(),
          ),
        ),
      ),
    );
  }
}

TabBar is placed in the AppBar's bottom property to display the tabs.
TabBarView is used to define the content for each tab. In this case, a simple Center widget displaying the text of each tab is used as placeholder content.
The DefaultTabController widget is used to manage the state of the TabBar and TabBarView widgets.