What is the ** syntax in Lua? Please help, since all i've been getting is errors.

Hi everyone, I was reading a question on "why my text label is not updating", but when I was reading the code written by the answerer, I came across ** in his code (see below). Please tell me what he means by this.

local Players = game:GetService("Players")

function onPlayerAdded(player)
    local Money = Instance.new("IntValue")
    Money.Name = "Coins"
    Money.Value = 166
    if player.PlayerGui:FindFIrstChild("ScreenGui") then -- this line isn't needed.
      player.PlayerGui.**.ScreenGui.CoinAmount.Text = Money.Value
    end
end


--When a player joins, call the onPlayerAdded function
Players.PlayerAdded:connect(onPlayerAdded) 

--Call onPlayerAdded for each player already in the game
for _,player in pairs(Players:GetPlayers()) do
     onPlayerAdded(player)
end

(This code was written by superhudhayfa)

Thanks, FD284