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You can include another person's Confluence username in your status update, using square brackets and the tilde sign in the format [~username]. Confluence will send that person an email message with your status update.
Note: Mentions in status updates don't appear as notifications in the Confluence workbox.
Your 'Status Updates' view shows a history your status updates. To view your status updates, choose your profile picture at top right of the screen, then choose Status Updates. View another user's status by going to their profile.
You can also clear your latest status update, or delete older updates from this view.
The status update functionality is provided by a plugin called 'User Status'. To remove the status updates functionality from your site, you can disable the plugin.
You can also set the Confluence site permissions to determine which users can use status updates. By default, users will not have permission to use this feature. See Global Permissions Overview.