What is a commission?

A commission is when a person or company hire you to create something for them. For a commission to work, you need two things. You need equipment to do the work, and someone to want some work done.

Usually, the first thing that happens, is that someone sees some work you have done and likes it.
If they want something made, but don't have the skills or equipment necessary, they may request you make something for them.
You would then have meetings with the client to discuss what they want and what you can actually make until you come to a good compromise.
You then go and produce whatever it is the client wants.
You show it to the client, and they say what they like, what they don't like and what they want you to do about it.
You then re-edit your product to meet their expectations.
They pay you.