What is the difference between all the powder makeups?

What is the difference between all of the following...





- Powder makeup


- Pressed powder makeup


- Loose finishing powder





And what does each one do?What is the difference between all the powder makeups?
Powder make up: coverage in the form of loose powder.


Pressed powder make up : make up powder in a pressed block, this usually has more oil and emoilliants in it so isn't as good for oily skin as the powder make up.


Loose finishing powder: is technically not make up as its not used to provide coverage but is dusted on to help your make up stay put.