Acne scars, discolorations, blemishes of all sorts and more usually need to be
Imagine a situation where every single discoloration/acne scar/blemishes shows under the makeup? It won't be a pleasant sight and of course it would be far from 'on fleek' (apart from the fact that looking that funny is so 1990!)
People's scarring/facial discolorations come in different shades so its important to know what shade also (orange tones work best for dark skintones) works for colour correction.
Watch and learn how to perfect colour correction in easy steps above.