What exactly is tuple and how is it used?

I'm editing this script (Btw, I'm learning how to script) and I see tuple, but I don't know what it means. Tuple is in line 10 and 11.

local panelID = 3 -- MAKE SURE THIS NUMBER IS NOT THE SAME AS ANY OTHER MACHINE ID ON THE SERVER

local replicatedStorage = game:GetService("ReplicatedStorage")
local remote = replicatedStorage:WaitForChild("RemoteEventSCPPanels")

--Data saving.
local gateMoving = false

remote.OnServerEvent:connect(function(player, ...)
	local tuple = {...}
	if tuple[1] == panelID then
		if tuple[2] == "HCZLockdownOn" then
			if player:GetRankInGroup(3097900) >= 1 then
				if gateMoving == false then
					gateMoving = true
					local task = coroutine.wrap(function()
						while gate1.Position.Z < -555.887 do
							gate1.CFrame = gate1.CFrame + Vector3.new(0, 0, 0.1)
							wait(0.01)
						end
						gateMoving = false
					end)
					task()
					local task = coroutine.wrap(function()
						while gate2.Position.Z > -526.704 do
							gate2.CFrame = gate2.CFrame - Vector3.new(0, 0, 0.1)
							wait(0.01)
						end
						gateMoving = false
					end)
					task()
				end
			end
		elseif tuple[2] == "HCZLockdownOff" then
			if player:GetRankInGroup(3097900) >= 1 then
				if gateMoving == false then
					gateMoving = true
					local task = coroutine.wrap(function()
						while gate1.Position.Z > -564.887 do
							gate1.CFrame = gate1.CFrame - Vector3.new(0, 0, 0.1)
							wait(0.01)
						end
						gateMoving = false
					end)
					task()
					local task = coroutine.wrap(function()
						while gate2.Position.Z < -517.704 do
							gate2.CFrame = gate2.CFrame + Vector3.new(0, 0, 0.1)
							wait(0.01)
						end
						gateMoving = false
					end)
					task()
				end
			end
		end
	end
end)