It was confusing to me too, at first. Then they made me one of the Moderators. It became even more confusing then!
Quoting a user means just that. When you press the Quote button, what they've posted will appear in what you post next.
If you'd like to experiment around with how to use this site, please click on the following link.
https://www.askmehelpdesk.com/forum-testing/
In the upper, left hand side of the page, you'll be able to start a new thread. Please feel free to experiment with different things there on how to use this site. You can't go wrong there, but just need to practice...
No one is going to "get on your case" there because of what you've posted. It's the practice section of this site.
Thanks!