On character movement updated node - How does it work?

It seems to trigger even when the character is not moving. What am i missing?
The online documentation is not much help. (On Character Movement Updated | Unreal Engine Documentation)

Hi there! OnCharacterMovementUpdated is indirectly called in TickComponent of UCharacterMovementComponent, so it is called every frame. The description is rather full - this node is same as Tick, but it has some pros when working with network updates.

Thank you. I’m still learning the ropes. But i get it now.