npm stands for Node Package Manager. npm provides the following two main functionalities :
* Online repositories for Node.js packages/modules which are searchable on search.nodejs.org
* Command-line utility to install packages, do version management and dependency management of Node.js packages.
* Another important use for npm is dependency management. When you have a node project with a package.json file, you can run npm install from the project root and npm will install all the dependencies listed in the package.json.
