What does blusher do?

It adds a blush-like color to your face. A lot of people use it to raise their cheekbones, but that's not really what it's for; the best product for that is "contour powder" which is just a little darker than your skin is. If you look really close at a photo of an actress, you'll see they put blusher, which is the reddish product, ON the cheekbone and a brownish product UNDER her cheekbone.