What is the purpose of "pm2 save"? : <p>I am using pm2 to manage my node.js processes. Very happy with it so far.</p>

<p>What is the purpose of <code>$ pm2 save</code>? What is the purpose of saving a process list? I don't quite understand from the documentation.
<a href="https://github.com/Unitech/pm2" rel="noreferrer">https://github.com/Unitech/pm2</a></p>
