Azure App Service is a fully managed platform-as-a-service (PaaS) offering from Microsoft Azure designed for building, deploying, and scaling web applications.
Steps to create an App service include logging in to Azure portal, creating a new web app, configuring runtime stack and region, accessing advanced tools, and uploading code.
Web apps are online applications accessed through a browser, requiring no installation, and combining front-end and back-end technologies.
Creating a web app and uploading it to an Azure App Service allows developers to quickly deploy and manage their applications in a secure and scalable manner.