What function does the cabin air filter have in a Jeep Liberty 2012?

The cabin air filter in a 2012 Jeep Liberty (like in most vehicles) filters the air that comes into the passenger compartment. Its primary function is to remove dust, pollen, dirt, and other airborne contaminants before they enter the heating and air conditioning system, improving the air quality inside the vehicle for the occupants. This helps prevent allergies, respiratory problems, and keeps the interior cleaner.