What are the different layers involved in the installation of drywall?

The installation of drywall involves several layers: the first layer is the drywall panels themselves, which are attached to the wall or ceiling studs. The second layer is the joint compound, which is used to fill in the seams between the panels and create a smooth surface. The third layer is the tape, which is applied over the seams to reinforce them. Finally, a finishing layer of joint compound is applied to smooth out any imperfections and create a seamless surface for painting or finishing.