Primer, is a commonly skipped but vital step. A good primer can make your face a smoother canvas for foundation to adhere and can help hide common makeup mistakes like streaks and common skin problems like large pores and redness, while adding longevity to your makeup.
Using the right primer can counteract discoloration and even out skin tone. There are also primers that address specific skin types (oily, normal, combination and dry) picking the right primer will ensure a more flawless looking makeup.
Primer should be applied after your moisturizer and before your foundation. "It's like waterproofing your skin," says Jim Hammer, a cosmetic chemist at Pharmasol Labs in Easton, Mass. If you apply it before your moisturizer, those water-based products can't penetrate the skin. "If you smooth [the primer] on after, your skin can absorb your moisturizer before the primer forms a slick film on top of it," says Hammer.