When you use Save Attribute, GS saves the attribute you choose for later use. So when you want to re-load that attribute if someone has quit, or restart the game, It will load it back in. The key is just like reference for when it saves it, so GS can find it again and reload it into "Attribute."
Comments
Hope this helps!
-Jake
http://gamesalad.com/forums/topic.php?id=33635