Hi,
I can't seem to find the action 'Wait For Trigger'
But i guess it works the same as on a 'Trigger Event' action.
What it does is, it will store the GameObject.
Lets say you have 10 objects, all with a trigger action.
When you collide one of those objects and you want to know which object you hit, then you can use this variable.
You can use a Global variable, or you can use a 'Set Fsm Game Object' action in the next state of the collider and set a variable on (for example) your gamemanager fsm.