How to pin Applications to the taskbar or the Start screen in Windows 8.1

Windows 8 and Windows 8.1 come with a secret hidden folder which contains all installed apps including Modern apps along with classic desktop app shortcuts. It provides a fast way to open Modern apps from the Desktop environment, however, it has no shortcut to launch it, only a special shell command. Let's see how to create a shortcut to that folder to open it directly and pin it to the Start screen or to the taskbar.