Listening is one of those skills that many take for granted. It's one thing to listen to what is being said, and it's a much more involved exercise to comprehend what is being expressed. After all, a speaker is much more likely to be responsive to feedback if they trust that the listener truly understands the point(s) that they are trying to convey via the conversation.
Conversations are a cultural exchange of thoughts, ideas and emotions. In any wholly successful exchange, all parties walk away feeling personally satisfied with the outcome. Therefore, it behooves listeners greatly, to their own end, to ensure that the speakers are being clearly understood; scratch my back and I'll scratch yours.