An often overlooked feature of cPanel is the webmail interface, which offers far more than just a place to view your email. It is a very powerful tool that allows email users to fully manage their own email accounts. The interface was recently updated in cPanel 84 and includes a few new features as well.
From within webmail you can view device configuration information, setup filters or forwarders, change your password, configure spam filtering, manage disk usage and even track delivery of emails.
This can be a tremendous time saving tool for both you and your clients because it empowers email users to manage their own account. Simply send them to /webmail on their domain and they can login with their own email address and password.