Create a News Broadcast and select the date and time when the Broadcast should be aired, and to which Channel.
The broadcast could be a Company News bulletin, from 'Acme Co have just purchased another 10,000 licences' to the Sales Team, to even just 'Happy birthday, Fred' to his Team's Channel.
The following Broadcasts are displayed automatically if Social Settings are enabled on the Administration page:
Behaviour Broadcasts - As soon as a User attains an award, e.g. Opportunity Close.
Poll Results Broadcasts - As soon as a Poll has finished the results will be displayed on the Channel.