Hi,
 This one is tricky one 

say you have 
-- GameObject A
-- GameObject B with a child called C
If you want to have A and C aligned, this is tricky, with this action it's easy now 

 so you would say, "Move and rotate B so that A and C are aligned".
 The typical scenario is lego like bricks, where for a given part you have many different pegs and anchors, and so you can move the whole part and align it to another by simply telling what's the anchor to use within that part.
 It's available as well on the 
Ecosystem if you want to easily get it directly in your project!
 Bye,
 Jean