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

The purpose of using a base coat in nail application is primarily to protect the natural nail and enhance the adherence of the polish applied on top. The base coat creates a barrier between the nail and the colored polish, which helps prevent staining of the natural nail and promotes a smoother application of color. Additionally, it can fill in minor imperfections in the nail surface, allowing for a more even application of polish. The base coat can also contribute to the longevity of the manicure by helping the color adhere better and resist chipping, ensuring that the nails look their best for a longer period of time.