My stylist recommended I purchase a vent brush. What type of brush is this, and how should it be used?

A vent brush features openings in the back of the brush to allow air from the blowdryer to flow through. Drying and styling time is reduced using a vent brush, and it also creates added volume. If you use a ceramic vent brush along with a ceramic blowdryer, you can cut drying time by up to fifty percent!