A package manager helps you automate the installation, updation, configuration, and application removal. They are used in operating systems and programming environments and help avoid dependency hell. Key functions of package managers include ensuring the package's authenticity, downloading software from an online repository, updating existing software, etc. There are many types of package managers, binary packages, source code-based packages, hybrid systems, meta-package managers, applications-based managers, etc. There also exist blockchain-related package managers. One such manager is the Node Package manager. NPM is the largest software registry in the world that allows individuals to utilize shared resources via their open-source repository.