Announcement is very important to Spread news across your organization, and Chatter is an awesome feature in Salesforce to do that. Post group announcements is to highlight important messages on the group page. I have written a few articles on Chatter. Why not check them out while you are at
Tag: Chatter email
Customize Branding for Chatter Email Notifications
Chatter can send you an email when somebody follows you, posts to your profile or groups, and much more. You can also receive daily or weekly abridgments with posts and comments from your feed and groups. In all email notifications, you can notice, it comes with the Salesforce logo and