Help with "announcement system"

Hello!
I am curious about something that is very usual to appear in many games.

In “Bounty Alert…”, we have a kind of announcement system. How use that thing… and what is its name?

Game used - Criminality

local StarterGui = game:GetService("StarterGui") 

StarterGui:SetCore("SendNotification", {
	Title = "Notification", -- Title of the Notification (Required)
	Text = "Whatever you want here.", -- Notification Text (Required)
    Icon = "", -- Your icon here. (Optional)
	Duration = 5, -- Duration (Default is 5 seconds)
	Callback = bindable, -- Callback function (Optional)
	Button1 = "First Button", -- Button (Optional)
	Button2 = "Second Button" -- Button (Optional)
})
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