User blog:Gleekfan101/Admin Thread Help

Hello there! I'm Jordan. I know this may not be the correct place to ask questions, but I felt since I need this question answered, I may as well ask.

Anyway, on my glee fan fiction wiki that can be found here, I am an admin/buro on the wiki, as I'm the one who writes the fan fic. I want to send out a message thread type thing to all users of my wiki. The type where ALL users of the wiki will be notified when it is sent. An example of one can be found here, in case you don't understand what I'm talking about. I've tried looking in the admin dashboard, but I can't find anything. It's kind of hard to explain, so I'm not sure if I got my message across very well, but nevertheless, I'm creating this blog :P

I'm really unsure of how to create and send one, so if anyone would mind helping me out, I'd really appreciate it. I'm sure once you've explained it, I'll be fine.

Thank you in advance to anyone who comments to let me know. :)