The main task of a daily moisturizer is to repair and nourish the skin barrier, stabilize the moisture level in the skin, balance the sebum production and lock in the serum and other active ingredients previously applied to the skin. A lighter day cream suits an oily skin type or a sensitive skin that needs cooling, while a richer day cream suits a dry skin type to protect and nourish. Day cream is usually your last step in your skincare routine, before sunscreen is applied.