Serums are skincare products that are designed to deliver high concentrations of specific active ingredients to the skin, especially for the face and neck area. They usually have a light texture and can be oil-based or gels. Serums are ideally applied as a nourishing base before applying a moisturising cream or mask. Serums can also be applied selectively to specific areas of the skin on the face. This process, called face mapping, enables the user to pamper targeted areas of the face and address specific issues.