FindPartOnRay quick question!!!! ?

I've been learning raycasting and decided to make the raycasting laser gun. Here is the script:

local tool = script.Parent
local user
tool.Equipped:connect(function(mouse)
   user = tool.Parent 
   mouse.Button1Down:connect(function() 
       local ray = Ray.new(tool.Handle.CFrame.p, (mouse.Hit.p - tool.Handle.CFrame.p).unit*300)
       local hit, position = game.Workspace:FindPartOnRay(ray, user)
       local humanoid = hit and hit.Parent and hit.Parent:FindFirstChild("Humanoid")
       if humanoid then
           humanoid:TakeDamage(30)
       end
       local distance = (position - tool.Handle.CFrame.p).magnitude
       local rayPart = Instance.new("Part", user)
       rayPart.Name          = "RayPart"
       rayPart.BrickColor    = BrickColor.new("Bright red")
       rayPart.Transparency  = 0.5
       rayPart.Anchored      = true
       rayPart.CanCollide    = false
       rayPart.TopSurface    = Enum.SurfaceType.Smooth
       rayPart.BottomSurface = Enum.SurfaceType.Smooth
       rayPart.formFactor    = Enum.FormFactor.Custom
       rayPart.Size          = Vector3.new(0.2, 0.2, distance)
       rayPart.CFrame        = CFrame.new(position, tool.Handle.CFrame.p) * CFrame.new(0, 0, -distance/2)
       game.Debris:AddItem(rayPart, 0.1)
   end)
end)

I do not understand this line: local hit, position = game.Workspace:FindPartOnRay(ray, user) why do they assign two variables for the FindPartOnRay method? Is "hit" supposed to take the value of the "ray" parameter and is "position" supposed to take the value of the "user" parameter? Because user was already defined above and it this wouldn't make sense. Did they just do this for simplicity sake so that when we talk about the damage, we can use hit, and when talking about the rayparts position, we use position? Thanks in advance for clarification