What's actor ticking mean?

When I learn ue4,some concepts confuse me a lot. My question is simple: what’s actor ticking mean?
I have learnt a little knowledge about computer graphic,so,from my view,I think this means shading actors per frame(like
determine position ,rotation etc.)
Dose my understanding all right?


Yep that’s pretty much it, the actor gets updated every frame.

Actor Ticking Doc

Thanks very much!