An application usually needs more than one route. Each route handles a different URL and returns a different response.

You can define multiple routes in the same server:

const express = require('express');

const app = express();

app.get('/', (req, res) => {
  res.send('Home page');
});

app.get('/about', (req, res) => {
  res.send('About page');
});

app.get('/contact', (req, res) => {
  res.send('Contact page');
});

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

Each route has its own path. When a request comes in, Express checks the path and runs the matching route.

For example:

• '/': home page;
• '/about': about page;
• '/contact': contact page.

If a route is not defined, Express will not know how to handle the request.

This is how applications serve different content based on the URL.