I am trying to get it so that I can send a message and it will be put into all servers.
I have no clue on how to start this, but the only idea I’ve had is something with datastores, but that seems too inefficient and I was hoping that there would be a better way
edit : message and also a “matchmaking system” so I can take players who press play (and they can be from different servers) and it will create a new server with those players in it in a ‘boss fight’ or some other type game mode
Does this help?:
This helps quite a bit, but is it possible to use that to pass data through like strings without chatting it
Hello, can you explain more to what you’re trying to achieve?
Sorry i was vauge a bit, my end goal is to have a “matchmaking system” so i can take players who press play (and they can be from different servers) and it will create a new server with those players in it in a ‘boss fight’ or some other type game mode
It’s fine 
, you can you ReserveServer to Create a private server and use the returned code to Teleport the players to the Private Server, here you can use MessagingService to send the code cross-server. Hope this helped, if this isn’t understandable feel free to ask.
The example he posted just uses the Cross-Server Messaging feature to build a ‘Cross Server Chat’. It’s just an example to show you the functions. You obviously do not need to use Roblox chat, just take the components you need for your own system.