You can turn email notifications for various events off and on on the Email Notifications settings page:
If you turn email notifications on or off here, these changes only apply to you, not to other users on your account.
Slack & Teams Notifications
To customise which messages are sent to Slack and Teams (if you are on the Pro or Vanguard plan and have these integrations enabled), go to the Slack & Teams Notifications settings page:
Any changes you make on the Slack & Teams Notification page will affect your organisation's Slack/Team integration.