Concealer is a cosmetic product that is used to hide imperfections and discolorations on the skin. It is available in cream or liquid form and can be applied to specific areas of the face, such as dark circles under the eyes, around the nose, and on blemishes or dark spots. Face concealer is similar to foundation but is typically thicker and more pigmented. Its purpose is to provide coverage by blending into the skin with a concealer brush or sponge and creating a more uniform complexion.