Hello @Lisa K ,
All notifications settings for a project are configured in the "Notification Scheme." You will need System Administrator access to make changes to this scheme. In the Notification scheme you can determine which events make a notification, and who should get those notifications.
Take a look at a portion of a Notification Scheme I attached here.
Here is the documentation about it - https://support.atlassian.com/jira-cloud-administration/docs/configure-notification-schemes/
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