The slots in a spatula serve a couple of purposes. One of the main purposes is to allow excess liquids or grease to drain off the food being turned, making slotted spatulas highly versatile as they can be used on delicate foods as well. The slots reduce surface tension, making slotted spatulas better at picking things up. Slotted spatulas are great for separating food from the oil or juices its cooking in, and they are ideal for when you want to leave some liquid behind from whatever youre turning, like a burger patty or a fried egg. The slots also reduce friction, making it easier to slip the spatula in and out with less problems. On the other hand, solid spatulas are better for delicate things that cant really support their own weight, like pancakes or scrambled eggs. Solid spatulas should be used when you want to prevent the food youre picking up from falling apart. In summary, slotted spatulas are best for when you want to leave some liquid behind from whatever youre turning, while solid spatulas are better for delicate foods that cant support their own weight.