Setting Up Email Notifications for Review Status Change

You can set up email notifications for your users on the Notifications setup page when there are changes to the review status.

By default, any status changes during the review process create notifications within the application. When received, a circle showing the number of unread notices appears next to Notifications in the application's banner bar. Select Notifications to view them.

Additionally, you can set up the application to send email notifications to your users.

Select Setup > Notifications from the menu.
The Notifications column lists various notification events while the In App Notifications and Email Notifications columns list options for settings changes for each notification event.
Find the Review Status Changes event and change the Email Notifications setting from None to All Recipients.
Select Save to complete the process.