With PaaS, users can better manage servers, storage, networking and operating systems in general. All apps built using PaaS include characteristics of the cloud, such as scalability, availability, and multi-tenancy. In addition, it is quicker and cheapens the process of creating, testing and launching apps.
PaaS is utilizing the infrastructure services and add software platform services to it. The basic idea is to help the application developer to his core strength and relive him from dealing with the application hosting platform.