When it comes to applying primer and moisturizer, the general consensus is that moisturizer should be applied first. Moisturizer helps to hydrate and nourish the skin, and applying it first ensures that the skin is well-moisturized before moving on to the next step. Applying primer first can lead to dry, lackluster skin, especially since primers are not formulated to provide skin with moisture. However, if you have oily skin, you may want to apply primer first in order to create a smooth surface for the foundation and help control oil production. If you have combination skin, you may want to apply both primer and moisturizer, applying primer first in areas where you tend to get oily, such as the T-zone, and then applying moisturizer in areas where you tend to get dry, such as the cheeks. Its always advised that you let your moisturizer fully absorb before applying primer, makeup, or sunscreen. Ginger, a makeup artist, recommends waiting at least one minute after moisturizing before applying makeup primer.