Node.js is a JS runtime environment which allows the infrastructure to build and run an application. It’s a light, scalable, and cross-platform way to execute code. It uses an event-driven I/O model which makes it extremely efficient and makes scalable network application possible.
With more than a billion downloads, Node.js thrives in building real-time applications, Internet of Things, and microservices. It’s gaining traction faster than any other technology and ranks in the top most-in-demand developer skills.