The Server Manager in Windows Server 2012 has been redesigned, received a new interface, and has new and increased functionality. With Server Manager, you can easily manage multiple remote servers. Using Windows Server 2012 Server Manager, you can remotely provision roles and features quickly on a server from a central computer. You can use the new Server Manager dashboard to view, install, and remove server roles and server groups (or you can use PowerShell Install-WindowsFeature or Remove-WindowsFeature. Prior to this you had to either use a Remote Desktop Connection or physically access the computer to provision new roles. You can also install the Remote Server Administration Tools (RSAT) for Windows 8 and use a Windows 8 computer to manage Windows Server 2012, Windows Server 2008 R2, Windows Server 2008, and even Windows Server 2003.
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