This will set what priority level for news will be rebroadcast to the users who are +n. They will receive newsflashes of all news at the set priority level and higher as it comes in. If the priority level is set to none then they will not receive incoming news.
/as news priority medium
The lower the priority level the more news will be sent to everyone who is +n. This interacts with NEWS INITIAL which determines how much news is sent in an initial burst to all +n java clients. See NEWS INITIAL for more information.