What does SPF stand for?Updated a month ago

SPF stands for ‘sun protection factor’ and is used as an indication of how long it would take the sun’s UV radiation to burn your skin when using sunscreen versus time it would take without any sunscreen. Wondering how that applies to real life? Essentially, it means an SPF 30 would take you 30 times longer to burn compared to if you weren’t wearing that sunscreen. SPF 50 would take you 50 times longer. Remember, it’s still extremely important to reapply and avoid direct sunlight even when wearing sunscreen as a small percentage of the sun’s rays still hit your skin.