In the account settings at Workflows, you can activate email notifications for managers and members.
These are the notifications that are currently available; more events will be added in the future:
Manager notifications
Notify campaign creators of new comments
Notify managers about new reward requests
Notify managers of new referrals
Notify managers when a new suggestion comes in
Member notifications
Notify members when someone mentions them in their comment
Notify members when someone replies to their comment
Reminder for inactive members (i.e. when members haven't viewed or interacted with campaigns for 30 days)
Notify community members when a new campaign goes live
Notify members when they can claim a reward
Notify members about mystery rewards
Notify members when their reward request is fulfilled
You can also see what the email will look like by clicking on the preview button: