Sun Protection Factor, commonly known as SPF, is a critical term to understand when it comes to protecting your skin from the harmful effects of the sun. SPF is a measure of how well a sunscreen can protect your skin from UVB rays, which are the primary cause of sunburn and contribute to skin cancer.

The SPF number indicates how long you can stay in the sun without getting sunburned compared to how long you could stay in the sun without any protection. SPF Meaning For example, if you use an SPF 30 sunscreen, it means you can be in the sun 30 times longer without burning than if you were not wearing any sunscreen. However, it is important to note that no sunscreen can block 100% of UV rays.