What is the purpose of using a primer before makeup application?

Using a primer before makeup application serves primarily to create a smooth base and extend the wear of the makeup. A primer is formulated to fill in fine lines and pores, providing a uniform surface that allows makeup to glide on more easily and adhere better to the skin. This helps to prevent makeup from settling into creases or fading throughout the day, thereby enhancing the overall appearance and longevity of the makeup look.

While hydration can be a secondary benefit of certain primers, the core purpose revolves around ensuring a smooth application and increasing staying power. The intention of a primer is not to add color or increase oiliness; these functions are associated with other products and techniques in a makeup routine. Hence, the choice highlighting the creation of a smooth base and enhancing wear encapsulates the primary role of a primer effectively.