This is a debug place where we can read data from the client and display it.

To view the debug place go here.

This is the viewport size from the camera, but in simple terms it's the pixel size of the Roblox Player App.

local Camera = game.Workspace.CurrentCamera
print(Camera.ViewportSize.X, Camera.ViewportSize.Y)

This value tells you what device it's think you're on. These values are "PC","PHONE","ClOUD"

"CLOUD" are for sevices Like Now.gg that allow you to play Roblox on the cloud using the web.

Using Rojo 7.2.1.