Node Version Manager (nvm) is a tool for managing multiple active Node.js versions on a single system. It allows you to install, switch between, and manage different versions of Node.js and its associated packages on a per-user basis, without interfering with the system-wide installation of Node.js. This makes it a useful tool for developers who need to work with different projects that require different versions of Node.js.
With nvm, you can easily switch between different Node.js versions as needed, without having to worry about affecting other projects. You can also use nvm to install new versions of Node.js and keep your existing versions up to date.
Overall, nvm is a handy tool for developers who need to manage multiple Node.js versions on a single system.