Node.js is a server-side JavaScript runtime environment known for its event-driven, non-blocking I/O model. It is commonly used in the following domains:

• 1.Web Applications: Node.js is widely used as a backend for web applications, including single-page applications (SPAs) and real-time applications.
• 2.API Development: It is used to create RESTful APIs and microservices, providing data to frontend applications.
• 3.IoT (Internet of Things): Node.js is used in IoT platforms for real-time data processing and communication with connected devices.
• 4.Real-Time Applications: It is employed in real-time chat applications, online gaming servers, and collaborative tools.
• 5.Streaming Services: Node.js can be used to build streaming platforms for audio and video content.