Makeup primer or face primer helps to create a smooth canvas for makeup application. You can apply makeup primer under your foundation, eyeshadow, tinted moisturizer, and more to create a smooth, flawless look. Primer is designed to help enhance and improve makeup coverage and many formulas also help your makeup stay on your face longer. To find the best primer for you, look for one specifically formulated for your skin type, whether that is oily or dry, so that it performs in the best way possible. Many primers come in a formula for all skin types, while others may feature a hydrating formula to soothe dry skin.