the policy is creating the kioskuser0 and confgures the autologon. If you combine this with a Autopilot Self Deploying Mode (SDM) Profile then the OOBE will enable the Enrollment Status Page (ESP) and waits for the receiving of this policy and then when it proceeds the kioskuser0 autologon will instantly take you to the Kiosk. In my tests I found a problem in this mode as the ESP is currently not correctly waiting for the kiosk profile therefore the autologon is not working. This is currently known by Microsoft and they are working on a fix.