Powder can reduce shine, set a base or add a soft finish, but using it everywhere is not obligatory. Start with what you want your makeup to look and feel like.
Loose or pressed?
Loose powder can be applied in a light veil with a fluffy brush; pressed powder is convenient to carry for touch-ups. Both come in different finishes and shades, so test a small amount where possible.
Apply only where you want it
Tap excess powder off the brush and work in thin layers. You might prefer a little around the center of the face while leaving the cheeks fresh. If makeup begins to look dry, use less or reconsider the formula.
Check the finish in daylight
A translucent label does not mean that every powder looks invisible on every skin tone. Test a light layer when possible and check for a cast in the light where you will spend most of your day.