Concealer has to be one of the most important beauty products in your makeup bag. This beauty must-have can leave anyone's skin looking flawless, but it's actually a lot trickier to use than you might think. Concealing imperfections is an art form in and of itself, and it's all about finding the right formula, figuring out the best technique, and knowing how much to apply. Too little concealer can leave dark circles, wrinkles, and blemishes all on display. But too much concealer can actually highlight what you want to hide. I got the scoop on how to help you use concealer to score a perfectly flawless looking face!