NPM is a package manager for Node.js packages, or modules if you like.

NPM is the package manager for the Node JavaScript platform. It puts modules in place so that node can find them, and manages dependency conflicts intelligently. It is extremely configurable to support a wide variety of use cases. Most commonly, it is used to publish, discover, install, and develop node programs

A package in Node.js contains all the files you need for a module. Modules are JavaScript libraries you can include in our project.