Concealer is a cosmetic product designed to cover imperfections on the skin, such as dark circles, blemishes, and redness. It typically has a thicker consistency than foundation, allowing it to provide more coverage. Concealers come in various forms, including liquid, cream, and stick, and are available in a wide range of shades to match different skin tones. To apply concealer effectively, it is often recommended to use a small brush or your fingertip for precision. Many people choose to use concealer after applying foundation to enhance its coverage. Popular brands of concealer include Maybelline, NARS, and MAC.