The primary benefit of wearing sunscreen is to protect the skin from the harmful effects of ultraviolet (UV) radiation from the sun. Sunscreen helps to prevent sunburn, skin damage, and the risk of developing skin cancer. It works by either absorbing or reflecting UV rays, thereby reducing their penetration into the skin. Regular use of sunscreen can also slow down skin aging and prevent dark spots. It is essential to choose a broad-spectrum sunscreen with an appropriate SPF (Sun Protection Factor) rating and to reapply it every two hours, especially during prolonged sun exposure.