- Azure App Service allows hosting of web applications, APIs, and mobile backends using various programming languages and frameworks. Apps can be easily scaled and run on both Windows and Linux. - Containers provide a consistent deployment model, support for multiple frameworks and versions, and multi-container deployments. Apps can also trigger deployments from container registries. - The document demonstrates running a WordPress/Nginx Docker container on a web app, scaling an app service plan, using deployment slots, and configuring continuous delivery to a staging slot triggered by an Azure container registry webhook.