MouseHover And MouseButton1Down?

Before we start I searched "MouseButton1Down" on google, and the roblox wiki came up straight away Make sure to search to see if this question has been asked before

Lets start

So, it is best if both of these scripts are in LocalScripts.

Mouse Click

First, I will write some variables, and the MouseButton1Down event:

--MUST BE IN LOCAL SCRIPT!--

local player = game.Players.LocalPlayer -- we find the player
local Mouse = Player:GetMouse() -- we get the players mouse

Mouse.Button1Down:connect(function() -- we check to see if the mouse has been clicked
    print("Button1Down") -- if so, we print Button1Down
end)

Understand? Let me explain in detail.

local player = game.Players.LocalPlayer 

We get the local player, so we can see if they have pressed the mouse or not

local Mouse = Player:GetMouse()

We access the players mouse.

Mouse.Button1Down:connect(function() -- we check to see if the mouse has been clicked
    print("Button1Down") -- if so, we print Button1Down
end)

We check if the player has clicked the mouse, if so we print Button1Down, if not then we end the statement.

Mouse Hover Because I explained above, I wont go in so much detail but I will still leave comments,

script.Parent.ClickDetector.MouseHoverEnter:connect(function()-- Check to see if player has hovered over the object
   print("Hovered!") -- Print Hovered!
end)

I hope I helped you with this, and increased your knowledge of lua!