Platform as a Service (PaaS) is a cloud service model that provides a complete platform for building, testing, and deploying applications. The cloud provider manages the infrastructure, operating system, and runtime environment.
Developers only need to write and deploy their code without worrying about server management. Popular PaaS services include Azure App Service, Google App Engine, and AWS Elastic Beanstalk.
In simple words, PaaS helps developers build and deploy applications faster by removing the need to manage servers.