By connecting to the remote server running on the EC2 and viewing the applications that have been deployed on the remote EC2 instance via IIS.
IIS is the name of the Windows Webserver service.
So you can have a windows Remote Server that is always on and managed by AWS. It is elastic and saves cost of managing your own server.
Open Remote Desktop Application in your local PC and use the Public DNS of the EC2.
IIS serves a platform or tool for deploying your application.