Node Js
In short
A cross-platform, open-source environment that allows developers to run JavaScript code outside of a web browser.
In plain words
Usually, JavaScript only works inside websites to make them interactive. Node.js lets programmers use that same language to build the backend of websites and create tools for their computers.
A simple example
A developer uses Node.js to build a chat application where messages are sent instantly between users. They write the logic in JavaScript, just like they would for a website's buttons.
Why it matters
It allows developers to use a single programming language for both the front and back ends of an application. This makes building complex software faster and more efficient.
Easy to mix up
Do not confuse Node.js with a web browser like Google Chrome, which also uses the V8 engine to run JavaScript.