Depending on your personal preference & settings, you probably already receive email notifications if your OWN discussion has been commented on.
However for other members content, did you know about the follow button?
Simply found at the top of the discussion, underneath the text box as shown below :)
Replies
Great idea and tip thanks Jessie.
Here's a thought for the 'new member welcomers' that connected with everyone new on site... follow this discussion! https://yourabn.co.uk/home/are-you-new-here-click-me