Loose powder used to set liquid foundation/concealer so that makeup lasts longer and does not move around, or rub off of your skin. Typically used in the “baking” method of setting your foundation.
Loose powder is also used to help define contour lines – or create a “chiseled” makeup look. Loose powders can also be used to set heavy makeup looks, for these types of looks loose powder is applies with a powder puff.
Loose powders are more finely milled so they contain less oils, and are typically used on oily skin types to control the oil your face develops throughout the day.