Node.js is primarily utilized for creating non-blocking, event-driven servers, thanks to its single-threaded architecture. While it finds application in traditional websites and backend API services, it was purposefully crafted for real-time, push-based systems.
Node.js excels in real-time web applications that employ push technology, often leveraging websockets. Unlike the conventional stateless request-response model that defined web interactions for over two decades, Node.js facilitates web apps with real-time, bidirectional connections. In such systems, both the client and server can initiate communication, enabling seamless data exchange. This marks a significant departure from the standard web response pattern, where communication is always initiated by the client. Remarkably, Node.js achieves this using the open web stack (HTML, CSS, and JS) running over the standard port 80.