To use this eyeshadow base, first clean and dry your eyelids. Then, take a small amount of the base with an eyeshadow brush or your finger and evenly apply it on your eyelids. It will help your eyeshadow stay on longer and make the colors more vibrant. When you're done using it, keep the container tightly closed and store it in a cool, dry place. Avoid exposing it to direct sunlight or high temperatures. Also, if you have sensitive skin, it's a good idea to do a patch test before full application.