A PaaS platform for hosting web apps, REST APIs, and mobile backends. It supports multiple languages (.NET, Java, Python, Node.js) and automatically handles the OS, patching, and scaling.
The main example of PaaS in AZ-900. AZ-104 covers its configuration, deployment slots, and scaling. Question: what service do you use to deploy a web app without managing VMs? Azure App Service.
Azure App Service is a concept that can show up on the exam. Check the full guide to see it in context.