The PageView widget in Flutter is used to create a scrollable list of pages that users can swipe through horizontally. It's commonly used to create wizards, image galleries, or any kind of horizontal swiping interface.

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  final List<Color> colors = [Colors.blue, Colors.green, Colors.red, Colors.yellow];

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('PageView Example'),
        ),
        body: PageView.builder(
          itemCount: colors.length,
          itemBuilder: (BuildContext context, int index) {
            return Container(
              color: colors[index],
              child: Center(
                child: Text(
                  'Page ${index + 1}',
                  style: TextStyle(color: Colors.white, fontSize: 20.0),
                ),
              ),
            );
          },
        ),
      ),
    );
  }
}

In this example:

PageView.builder creates a scrollable list of pages based on the provided itemBuilder function.
itemCount specifies the number of pages in the PageView.
Each page is represented by a Container with a background color from the colors list, containing a centered Text widget displaying the page number.