Background on Shadow Copy
Shadow copy on Windows Server 2008 allows your server to make snapshots of a selected drive as a way to protect you from any accidental data loss that may occur. In my experience it saves a lot of time if you have this feature enabled. You might want to consider a server that has quite a bit of space on it.
For example: A user deletes a file stored on a file server, this server must have the File Services Role installed so that it can serve files to the users on your network.
If you don’t have shadow copy configured on the server, your only means of recovering that file would be to restore it from a backup image.
If you do have the server configured with shadow copy then it’s easy and quite simple to restore that file from the properties menu in the affected folder.