Built-in Middleware: Express provides built-in middleware functions that offer various functionalities, such as serving static files, parsing request bodies, and more.

Example: Serving static files

const express = require('express');
const app = express();

// Built-in middleware for serving static files
app.use(express.static('public'));

app.listen(3000, () => {
console.log('Server is running on port 3000');
});