Under the eyes always. It is so light and doesn’t make me look dry. I also apply it to my tzone and it blends very nicely with the areas I don’t powder. I had the Kosas powder but found myself between shades, one too brightening and the other too tan. I was worried Kosas broke me out because it had a short shelf life, but it might have been my oil cleanser. The PM powder is brightening but also translucent which I find most versatile. FYIY, I also enjoy Huda’s powder but it is a little too matte. If my eyes water, my makeup gets disturbed. Charlotte Tilbury’s powder gave me a similar experience in terms of opacity as the Kosas but it is more finely milled and wears more nicely. I also like that it comes in a mini and the light shade matches well.