From the forum landing page, you now have the ability to subscribe to all forum topics. When a reply is made in the topic you’re subscribed to, you’ll receive an email notification, as well as an in-platform notification.
Additionally, administrators can enter email addresses which should receive an email any time a forum topic is created. For more information on that feature, click here.
To access the Forum, click "Forum" in the left navigation.
You can also subscribe from within the topic itself.