Choose a concealer that goes with your skin tone. For highlighting, choose a shade lighter than your own skin colour. However, for shaping, choose a shade darker than your own skin colour.
Use a brush to apply the concealer to any imperfections and/or below the eyes.
You can apply concealer either under or over a foundation. After applying concealer and/or foundation, you can UNG Finishing Powder to fix it and keep it in place for longer.