Can someone explain this?

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1

You can write your topic however you want, but you need to answer these questions:

  1. Have a server run 24/7
    I know Roblox servers don’t do that but how is this possible, I’ve seen it!
  2. I can’t find any solutions on how someone achieved this!
    Link to vid!
  3. I Tried nothing yet but I can’t figure out how he did it!
    Does anyone how to do this or kinda understand whats happening!
2

Of couse server is not running 24/7, server data is getting stored in GlobalDataStore and every Server is getting listed into a gui. For example.
Server1 had 50 clicks last time, it got saved before last player left.
Player joins a lobby and joins the Server1
Usage of messaging service to know if Server1 is already running, if it is, teleport player to already running server, else create a new server using the data.

3

kinda makes sense but I’m still confused