A primer is a cosmetic product applied to the face before foundation or other makeup. It creates a smooth, even surface for makeup application and helps makeup last longer. Primers can also help to control oil production, minimize the appearance of pores, and reduce the look of fine lines and wrinkles.
For people with oily skin, a mattifying primer is a good choice. Mattifying primers contain ingredients that absorb oil and help to control shine. They can also help to keep makeup from sliding around on the face.