To manage your notification emails, go to My Profile > My Account.
You can also access this from the admin dashboard.
On the left-hand side, click 'Notifications'.
Here, you can turn 'OFF/ON' the notifications you receive.
If you do not want to receive emails about new student signups, simply slide to turn OFF it. Similarly, if you don't want to receive emails about new course enrollments or reviews added or updated, you can turn OFF these notifications as well.
Also, watch the video on 'Controlling Your Notification Emails You Receive'