Use the flat side to apply foundation (liquid or cream based) to ensure an even coverage. Apply using soft sweeps across the face. For more coverage, use a pushing technique by gently pushing the sponge into the skin
Use the rounded end to apply concealer to blemishes or imperfections by gently pushing the sponge into the skin. Use the flat sides for application of concealer under the eyes
Use the sides of the sponge to blend using a push and roll technique, gently pushing the sponge into the skin and rolling it away to help to blend your foundation