Windows – What exactly is the console session in RDP?

I can’t get a good definition of the difference between a normal RDP session and the /console (/admin in Windows 2008 and later) session.  

What can I do in console that I can’t do in a regular session?  

Solution:

The console session is what you see when you look at a monitor that’s plugged into the server. Normally with RDP you get your own session that is not the same as what’s shown on the server’s own monitor.

A typical example might be a backup application that is running on the console. You don’t want to log into a new session and start a second copy of the backup application; you want to monitor the backup application running in the console session.