It will keep the attached object in the center of the screen, but will not move any part of the viewport outside of the layout.
When attached to a character; moving the character to the bottom left will cause the behaviour to scroll to the bottom left.
If that's not what you want then there are system actions which allow you to manually control the camera position. "Scroll to position", "Scroll X", "Scroll Y", "Scroll to object".
You should just give it a go, takes like 2 minutes to create a project to test it.