How to learn 'Pose Driver Animation Node'?

Development Character & Animation
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1

Hi, I want to know how to learn ‘Pose Driver Animation Node’
I’ve search keyword ’ Pose Driver ’ in UE4 forum but I found nothing. still i need ‘Pose Driver Animation Node’
Please I need detail explanation. tell me any information about this.
[link text][1]

https://docs.unrealengine.com/latest/images/Support/Builds/ReleaseNotes/2016/4_13/image_44.gif

2

Not super complex, Epic team explained it in 2 minutes, watch this live stream at 16:30, it will last for couple of minutes.

-m