Platform as a service (PaaS) provides a complete cloud platform, including hardware, business software and infrastructure. It’s a popular alternative to on-premises solutions that can save costs and complexity.
A Convenient Solution
One of the things that makes PaaS appealing is “abstraction”—the underlying infrastructure of its architecture is kept out of view from users to make the system easier to use. Your computer’s operating system (OS) is a similar abstraction, keeping the technical details of how the system works “behind the scenes” so you can just use the applications you need.
Claus Jepsen 