I had not noticed it before but did today. Under our info on the left it says feedback. How do we leave feedback for others and how do we receive feedback and why is it even there?

This is to let us know how reliable you are to deal with, when buying or selling something
Plus we can leave comments

I clicked under your name on feedback. It sounded like it is used if you sell something.

It is also used for swaps.

Oh ok. Thanks.