Suppose if I buy something from a user in this forum ? And after the transaction and trading am I supposed to ask him to give me a feedback in my profile ? And doing it, how do you see this ?
You can see your feedback (and everyone else) if you click on Trust in your profile.
If you make a trade with someone you can write a feedback on his profile if you want, but that is not mandatory.
Asking someone to give you feedback does not mean he they do that, and I would first work on being more active in forum.
Most people won't risk making any trades with random newbies who made few posts in forum.