Messaging Service Global Announcements?

Hello everyone! I recently asked how to make a announcement system with model descriptions. Later on I found out that there is a new api called Messaging Service. Now my question. How do I use it to create a announcement system that syncs over all active servers? Thanks for your help.

first of all you need to be a beta member if you are not heres the link to join it: Beta Program
after you are a beta program member (which will take a while) you can make a regular script and put this example code in it

local Players = game:GetService("Players") 
local httpService = game:GetService("HttpService") 
local messagingService = game:GetService("MessagingService") 
function callbackFunction(serviceData)  
local decodedData = httpService:JSONDecode(serviceData.data)
print(decodedData.sender.." : "..decodedData.message)
 end) 
 
 Players.PlayerAdded:Connect(function(player) player.Chatted:Connect(function(msg)  
 local messageData = { sender = player.Name, message = msg, -- filter message first! } 
 local encoded = httpService:JSONEncode(messageData)
 messagingService:PublishAsync("Chat", encoded) 
     end) 
 end) 

 messagingService:SubscribeAsync("Chat", callbackFunction)

sorry for bad indenting btw