Permanent Rule contains those settings which you want to apply permanently i.e 24/7. For an android devices' monitoring, you have option to block available apps on registered device(s) as well as you can block website categories & URLs for 24-7. You should block those apps and websites under this rule which you always want to be blocked like porn & drug websites, adult apps etc. You will find these settings on your dashboard/account under Rules section i.e. with label APPS & WEB settings.