A portable air conditioner rolls on casters, so moving it around a room is easy, but transporting it takes two steps people skip: draining the internal condensate water and keeping the unit upright so the compressor is not disturbed.
Pro tip: Run the unit on fan-only mode for a while before draining to help dry the interior coils.
Watch out: Drain the internal condensate water before moving, or it will leak out during transport.