Hi NSEU,
rudderrudderrat has it about right, except
It makes sense to have the memo message displayed if the PVD is turned on - else you wouldn't know whether it was really on when it wasn't displayed (airborne say for Auto Land with possible manual roll out)
As far as I'm aware, the PVD turns itself off after liftoff and is not available in flight. It is intended purely for guidance during the take-off roll.
So the reason to have the STATUS message is that after you've turned it on (and adjuted the brightness) you then know that it will unshutter again when you line up and achieve the requirements listed by rudderrudderrat:
"PVD unshuttered -
PVD selected on, within valid localizer region, within 45 degs of runway heading, and on ground.