Like for commands or something. But you can just tell me how it detects it part ik how to do the rest.
You just set up a .Chatted
listener for every player as they join your game
Ex:
game.Players.PlayerAdded:Connect(function(player) player.Chatted:Connect(function(msg, recipient) if msg == "command" then -- code end end) end)
You can look into string patterns for more advanced techniques.