Windows PowerShell Web Access is a new feature in Windows Server 2012. It is an IIS application that provides a Windows PowerShell console in a web browser. The IIS application acts as a gateway between the web browser and the machines that you can connect to in your environment. These machines should have Windows PowerShell remoting enabled.
The video below illustrates the three simple steps of setup and configuration –
1. Feature installation
In the video we use GUI to install the feature. We could also use the Windows PowerShell cmdlet equivalent for installation (run the cmd in an elevated PowerShell console) –
Install-WindowsFeature –Name WindowsPowerShellWebAccess –IncludeAllManagementTools
Read more at source: http://blogs.msdn.com/b/powershell/archive/2012/06/27/windows-powershell-web-access-basic-installation-guide.aspx