What is commonly used to prepare the skin for makeup application?

Primer is specifically formulated to prepare the skin for makeup application. It serves several important purposes: it creates a smooth base for foundation, enhances the longevity of the makeup, and can help to minimize the appearance of pores and fine lines. By smoothing out the skin's texture, primer allows for an even application of makeup, helping it to adhere better, which can prevent it from settling into wrinkles or uneven textures throughout the day.

While moisturizers hydrate the skin and toners can help balance both pH levels and remove residual impurities, they don't provide the specific benefits that a primer does for makeup application. Face masks can deliver deep hydration or treatment benefits, but they are not typically used immediately before applying makeup. Their effects take time to set and are not focused on the immediate enhancement of makeup adherence and longevity. Therefore, primer is the most appropriate product to use in preparing the skin specifically for makeup.