Through WHM you can create both predefined hosting packages for domain owners and custom packages (each account created with the cPanel administration panel and all the facilities included in it).
Access to WHM will provide you with all the tools you need to properly manage your web hosting accounts. WHM / cPanel is currently the market leader, being recognized as the most efficient tool on the web hosting market.
Here's what you can do with WHM: create a new account, update a hosting account, create special hosting packages, configure databases, configure backups, install SSL certificates, configure reseller accounts, manage accounts, and more.