Azure App Service is a platform-as-a-service (PaaS) offering in Microsoft Azure that allows developers to build, deploy, and scale web applications, mobile backends, RESTful APIs, and more.
To create an App Service application in Azure, you need Azure CLI, an Azure account, a text-based user interface, a resource group, an App Service plan, and the web app itself.
The step-by-step guide includes downloading and installing Azure CLI, accessing Azure account with PowerShell, creating a resource group, creating an App Service plan, creating an empty web app, and deploying content (code) to the application.
By following these steps, developers can successfully create an Azure App Service application and upload their content (code), bringing their web app live on a reliable, scalable cloud platform.