When you create your Grid make sure to edit the details in section 3 (Features). See embedded picture below. There you can toggle the Notify Me to off as well as additional features.
You can also enter into your Grid and select Grid Actions. Once Grid Notifications is selected you will then see the options that you will see in the 2nd embedded picture below.
Embedded below is a 1 minute and 12 second YouTube tutorial showing what was discussed above.