Explain the role of primer in makeup application and discuss the different types of primers available, including their formulations and benefits.

Primer is a preparatory cosmetic product applied to the skin before foundation or other makeup to create a smooth, even surface and enhance makeup longevity. It helps to fill in pores, fine lines, and imperfections, as well as to control shine and oiliness. There are various types of primers available, including silicone-based primers, which provide a silky, matte finish and help blur imperfections; hydrating primers, which contain moisturizing ingredients to plump and hydrate the skin; and color-correcting primers, which target specific skin concerns such as redness or dullness. Choosing the right primer depends on individual skin types, concerns, and makeup preferences.