Can the meeting host respond to messages?

Yes, you can send messages from within the dashboard to the discussion board in the app using the ‘Host Message’ button.

Host messages appear with a black background in the app and in the dashboard, making them easily visible.

 

You can create a Host Message in any of the message views in the dashboard.  The above image shows a Host Message in the 'Published' view but if you have Moderation turned on, you can also create a Host Message in the 'Reviewed' message view too.  Why would you want to do this?  Well, if you have a presenter they can be looking at the 'Reviewed' message view, looking at the messages you are adding here but if you need to tell them something important: "You've got 5 minutes left" then as a Host you can quickly send something which stands out from the rest.