GameplayAbility -> PlayMontageAndWait

I’m trying use use node PlayMontageAndWait:

And i wan to know what this node waiting for??

I’m dont get exec OnCompleted… what this node (PlayMontageAndWait) needs to be completed ???

Thanx for your time.

BTW shame there is no GameplayAbility and GameplayEvent tags :frowning: :frowning: