This pin states that you can use white eyeshadow or white eyeliner as a base for your normal eyeliner and then it is supposed to brighten your normal eyeshadow. So I set out to try this out and I have to say I love it. It really does brighten your normal eyeshadow and bring your eyes out more. I prefer to use white eyeshadow than white eyeliner just because it spreads better and provides a better base. This is a great idea and one you should try if you want to add something to your makeup routine.