Concealers are cosmetic products designed to mask imperfections on the skin, such as blemishes, dark circles, and redness. They come in various forms, including creams, sticks, and liquids, and are typically thicker than foundation. Concealers are available in a range of shades to match different skin tones, allowing users to achieve a more even complexion. To apply concealer effectively, it is often recommended to use a small brush or fingertip for precision. Many people choose to layer concealer over foundation for better coverage. Popular brands of concealers include Maybelline, NARS, and MAC, each offering unique formulas to cater to different skin types and concerns.