Node.js is a server-side JavaScript platform that is designed for building scalable network applications.

Node.js provides an event-driven architecture and a non-blocking I/O API that makes it lightweight and efficient.

Applications are written using JavaScript and can be run within the Node.js runtime on any platform.

Node.js also provides a rich set of libraries and modules that allow you to easily create powerful applications.

In addition, Node.js has a large and active community that is constantly developing new modules and tools.