Pet Control Training

Rhugiga - Storm Legion

I have searched around the forums a bit, but have been unable to find very decent details about this. I have had a few guildies ask me about the system but havnt been able to give them accurate answers. Exactly what does the damage level boost? The threads I looked at didnt seem to come up with a sure-fire answer to that. All of them gave different answers which other players proved wrong. Does anyone know exactly what is effected? Same goes with the pet's group healing. Is that only on group healing skills or does that work with single heals as well?