Express.js is a minimal and flexible Node.js web application framework that provides a robust set of features for building web and mobile applications. It simplifies server-side development by offering powerful routing, middleware support, and a modular architecture.

Features of Express.js:

• Lightweight and fast framework for building web applications.
• Flexible routing system for handling HTTP requests efficiently.
• Middleware support for request processing, authentication, and logging.
• Supports templating engines like Pug, EJS, and Handlebars.
• Built-in error handling and debugging utilities.

To start an Express.js server, use the following command after setting up your application:

node server.js

Once the server is running, access the application at http://localhost:3000

Disclaimer: Express.js is an open-source software distributed under the MIT License. It is not affiliated with, endorsed by, or sponsored by any other company. Express.js is provided "as is," without any warranty, express or implied. Users utilize this software at their own risk. The developers and contributors to Express.js hold no responsibility for any damages, losses, or consequences resulting from the use of this software. Users are advised to carefully review and comply with licensing terms and any applicable regulations while using Express.js.