What are the diffirences between loose powder and compact powder ?

which one is better for weddings and special occasionsWhat are the diffirences between loose powder and compact powder ?
loose powder is just foundation powder that comes in a tub, and is generally a bit messier to use. compact powder is also called pressed powder. the product itself in a compact is the same as loose powder, but it has been pressed into a pan for convenience. compacts are generally better, in my opinion, for weddings and such; as you can take it with you for touch ups throughout the day without risking the powder spilling over your dress or in your handbag like a loose powder would.