PaaS in Azure (or in any public cloud) is more abstract than IaaS. It's simple to understand the IaaS model because it's not much different from on-premises: we create a virtual machine, we configure it any way we want, we install anything we want (of course, limited by the OS itself; we can't install something that wouldn't run on-premises either).
After we create our Azure VM, we have complete control over everything on that VM. For example, the VMs created in the previous chapter were intended to be used as web servers. We can connect to that VM and install all the required roles, features, and software in order to start hosting our application.
But what if we want to do a similar thing with PaaS?
An Azure App Service Plan is used to host our web applications in Azure. We need to create an Azure App Service Plan...