What is the purpose of putting a pale shade of eyeshadow on your browbone?

It highlights the top of your eye, under the brow, making it ';open up'; the eye area. An illusion that works....What is the purpose of putting a pale shade of eyeshadow on your browbone?
It highlights your eye to make is stand out more (:What is the purpose of putting a pale shade of eyeshadow on your browbone?
its used as a highlight and opens ur eyes making them appear bigger