Azure App Services provides managed hosting services for cloud solutions. It's a fully-managed platform that provisions and deploys cloud solutions. App Services takes away the burden of creating and managing infrastructure and provides minimum service-level agreements (SLA) for hosting your cloud solutions.
They are open; they let users decide on the language they want to use to build their cloud solutions, and flexible enough to host the cloud solution on either the Windows or Linux operating system. Creating an app service internally provisions virtual machines behind the scene that are completely managed by Azure, and users don't see them at all. Multiple types of cloud solutions, such as web applications, mobile backend APIs, API endpoints, and containers can be hosted seamlessly on Azure App Services.