When creating announcements on private pages, you have the option to hide the announcement-specific content in Email and Slack notifications. This gives you an extra layer of security when communicating private product updates to a specific audience.
Email example
The announcement title and body content are removed from the email. Viewers of the email must click "View announcement" and authenticate to the LaunchNotes page to see the content.
Slack example
The announcement title and body content are removed from the slack notification. Viewers of the slack message must click "Go to Announcement" and authenticate to the LaunchNotes page to see the content.