This Azure app services architecture diagram depicts a massive collection of servers and networking hardware that host a complex array of applications that control the operation and configuration of the software and virtualized hardware on these servers. Azure's power comes from its complex orchestration. Azure App Service is a web-based service that hosts web applications, REST APIs, and mobile back ends. You can code in your preferred language, whether it is.NET,.NET Core, Java, Ruby, or Node. In this Azure app services architecture diagram, there are three types of app services: Web App, API App, and Logic Apps.