In its most crucial role, sunscreen protects your skin from the sun’s harmful ultraviolet rays, which come in two forms – UVA and UVB rays. Sunscreen keeps your skin healthier in other ways as well. It protects sensitive skin against sunburn and it reduces the appearance of sun damage – discolorations and dark spots, sagging or leathery skin, and wrinkles. These protections help your skin maintain a more even skin tone overall.