I'm not sure if I remember it well.
On banner ad preloaded - That means the ad is downloaded from the internet.
On banner ad loaded - That means the ad is placed on the layout. (In a Once Trigger)
Loaded banner ad - Same with "On banner ad loaded" but it is not a trigger. (Runs every tick)
Let me guess, it is Cordova Admob by cranberrygame right? This plugin of his unfortunately doesn't have any description and makes it harder to understand.
BTW if you are making for mobile, this plugin doesn't work properly with IntelXDK anymore.
I suggest you use Josek5494 's plugins:
Paid version: ($20.00)
*100% ad income is yours..
*98% ad income is yours
*2% ad income for the developer (Liming Xie)
or you can use:
*100% ad profit is yours.
-Though, it doesn't have reward video interstital ad feature.