SharePoint Discussion List Alerts
Email alerts are a great way for your users to be notified of changes to topics they are interested in. There are a few different ways of subscribing to email alerts for Social Squared
1, Forum wide alerts
You can subscribe to get email notifications whenever a new topic is added to a particular forum.
2, Topic wide alerts
If you are interested in a particular topic, then you can sign up for alerts for it. You will then get an email notification whenever a new reply is added to that topic.
3, Sign up when creating a new topic or reply
You most likely want to receive forum email alerts when a topic you are involved in is updated with a new reply. Getting alerts for this is really easy as there is a checkbox that is ticked by default to sign you up for alerts when you create a new topic or reply.