The primary purpose of wearing sunscreen is to protect the skin from the harmful effects of ultraviolet (UV) radiation from the sun. Sunscreens contain active ingredients that either chemically absorb or physically block UV rays, helping to prevent skin damage, sunburn, and reducing the risk of skin cancers. Regular application of sunscreen is particularly important during extended sun exposure, as UV radiation can lead to both immediate and long-term skin issues such as premature aging, pigmentation, and an increased risk of malignant growths. An effective sunscreen should ideally have a broad-spectrum formula that protects against both UVA and UVB rays.