SPF is in my opinion the most important skincare step in your everyday routine so choosing one that works for you is CRUCIALL since there are a lot of categories, Ive tried many so here are my picks. SPF stands for Sun Protection Factor ☀️ It basically measures how well a sunscreen protects your skin from UVB rays, the ones that cause sunburn. For example, if your skin normally starts to burn after 10 minutes in the sun, an SPF 30 theoretically lets you stay out 30 times longer (so about 300 minutes) before burning as long as you apply it properly and reapply every 2 hours. Also choosing one HEAVILY relies on your skin type and your needs!