What do you know about the Nazi's concentration camps in World War II?

This I guess, not 100% sure about my stuff though- I don't look though world war II facts very often

Explanation:

I know that the people held in these camps were treated very poorly unless you were in what was called a "Show Camp". Show camps you would be treated with the basic necessities for filming reasons so that accusastions of mistreatment could be denied and so that they could try to convince people to come willingly instead of having to search for them.

answer: we need to see the ads : )