Express.js is a minimalist and flexible web application framework for Node.js that supports smartphones, web applications, and APIs.
Express.js offers middleware support, routing, and template engines, allowing developers to create scalable and customizable web solutions. As a part of the Node.js ecosystem, Express.js enables server-side JavaScript development, making it highly efficient for full-stack JavaScript development.
It is powerful in developing network-based apps, real-time apps, and most web developers rely on it to execute the code directly on the browser.
Prominent industry leaders that use Express Nodejs are PayPal, Netflix, Linked In, eBay.