It's possible to mention team members in comments that you post on requests. This is a useful way of notifying them about something relevant, and maintaining discussions, without having to leave Feedback.
To mention a team member, simply type the '@' symbol and then start typing their name. You'll see a drop-down with suggestions. Click the relevant team member and they'll be mentioned in the comment.
When you or another team member are mentioned in a comment, you will receive a Feedback notification.