What is the benefit of using a base coat in nail polish application?

Using a base coat in nail polish application primarily serves to protect the natural nail. This layer acts as a barrier between the nail and the colored polish, helping to prevent potential staining and damage that can occur from the pigments and chemicals contained in nail color. Additionally, a base coat can help to smooth out the nail surface, allowing for a more even application of the polish and enhancing its adherence, which can extend the longevity of the manicure.

While adding color, creating shine, or speeding up the drying process are appealing aspects of nail care, they do not represent the primary function of a base coat. The main benefit lies in its protective qualities, making it an essential step in a proper nail polish application routine.