What would onCharacterAdded(character, player) do inside this function?

So I'm following a roblox tutorial on the dev wiki and they do

local function onCharacterAdded(character, player)
 
end

player.CharacterAdded:Connect(function(character)
		onCharacterAdded(character, player)
end)

The part I don't understand is what is the purpose of onCharacterAdded(character, player) when its already in the first function?

This script will run when the player joins the game, hence the name onCharacterAdded.

what the script does is, whenever it detects a CHARACTER added into workspace, it runs the character added function. the CHARACTER parameter is the character of the player.

if u remove the last 3 lines nothing will even run because onCharacterAdded() is a function, and functions need to be called to be able to run. so by saying player.CharacterAdded:Connect(function()) end CALLS the onCharacterAdded() function

EDIT: j