A ceiling is a type of surface that has unique properties. Although they do not have much exposure to harsh external environmental conditions such as sunshine, rain, moisture, and wind, in the long run, they all tend to crack due to aging concrete.
In addition, the ceiling is located at a reasonably high position and out of reach of physical impacts, so the quickest and most effective option would be a single but durable coat.
Matte paints will effectively cover imperfections on the ceiling, and the varnish can usually create more open space for your room.