Turn the Lock Screen Password on if you’d like anyone who uses your Fire—including, of course, yourself—to enter a code before being allowed onto the home screen. The password prompt appears after you swipe the lock screen’s orange arrow. The Home Screen explains how to install this particular lock. The next two options—Credential Storage and Device Administrators—are for those who want to join highly secured WiFi networks (ask your friendly IT person for what to enter to join a VPN network) and for third-party apps like the Exchange-friendly Touchdown (see the Note on Note) that require a special password to control some under-the-hood functions of the Fire.