PaaS is not just website hosting.  To begin with Cloud PaaS is Auto-Scalable cloud infrastructure.  On top of that is a cloud stack of software that can be deployed in a few moments with the push of a button.  You can control and add load balancers, databases. Marketplace and GIT software packages on your cloud nodes.

Auto-scalable cloud nodes that can expand and stretch.  All while you save resources on paying for use as opposed to paying for a whole server by the hour.  

Near instant download and install of full stack software packages ready to deploy on your cloud nodes.