Client-Server Modelhttps://www.lukeko.com/33/client-server-model 0
Client - your personal computer, phone, tablet, or game console is a client. Every other unique player in the game is also a client.
Server - All clients (players) in the game are connected to a Roblox computer known as a server. The server is the game manager — it makes sure that every player is seeing and experiencing the game world the same as every other player