You can opt in to receive both browser and desktop notifications of activities that occur within the Community, and you can choose how you wish to subscribe to these notifications.
When you open a new discussion thread you will automatically receive email notifications when other people contribute to the discussion.
You will need to ensure that the Enable email contact box is ticked in your Settings.
If you would prefer not to see the Related Community Content pop up as you scroll down a page, you can 'turn this off' (or 'turn back on) under Settings.
You should also see notifications appear in the top bar.