I bought it after watching a video by Odagiri Hiro recommending it. I take a small amount in my hand, rub it in circular motions, and apply it from bottom to top to areas of my face where I have pores (for me, the sides of my nostrils and the left cheek area). Then I apply foundation on top of that, and it covers the pores and makes them less noticeable. It's not something that really makes me go "wow!", but applying this primer certainly does cover pores and makes touch-ups easier. It's a reasonably priced product, so I plan to buy it again once I run out of the one I'm currently using.