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 ?
There is no need to ask for anything after making transactions with other users on the forum. I think you should read more about the trust system that has been running on the forums. Please go to Guide by LoyceV which discusses how to use the Trust System properly.
LoyceV's Beginners guide to correct use of the Trust system