Roblox prompt features for joining game related events

I played a few games in the past like 2-3 years ago that used some sort of roblox service that made a gui pop up in the bottom right corner with 2 buttons allowing the player to click the 2 options.

I want to use this service to make an event system for my game. But I don’t remember what the service was. I could just make a custom one using gui scripts but I feel it be easier to use the provided roblox resource to do so.

So I was wondering if anyone knows what it was called. Basically the way it will work is it prompts everyone in all servers with a question like ‘do you want to join the event reward blabla’, and they click yes it tps them to the event basically.

I don’t think it’s a service. The devs probably simply fired a remote event to all clients from the server and made the gui pop up

If you mean on the website then that’s the experience notifications system.