You can manage all of your notification preferences from the Notifications tab of your Account Settings:
📝 Note:
You can change the Notification Settings for each calendar you can access.
If you do not want to receive an email for specific calendar activities, you must change the email notification frequency to None from the drop-down menu. You can also update the frequency of email notifications to hourly, daily, or a weekly digest.
Mobile Push, Slack, and Microsoft Teams notifications must be unchecked if you do not want to receive a specific type of notification.