Cats use their whiskers to help them navigate in the dark and detect changes in air currents. Whiskers are highly sensitive and can detect even the slightest changes in the environment, which helps cats identify potential threats and locate food. Additionally, whiskers help cats maintain their balance and agility, and can even help them determine the size of an opening before they attempt to enter it. Whiskers are an important part of a cat's sensory system and help them to stay safe and healthy.