I have been working with Palo Alto Networks devices since 2012 and one of the more confusing topics that I have helped with has almost always been: How do I activate, register or license a Palo Alto Networks device?
Although you may be able to search the Live Community and find an article or two that explains how to do this, there has not been a single place to visit and see how to accomplish this for all Palo Alto Networks devices and software.
Good news, everyone! A page located off the official Technical Documentation site has all this information in one handy dandy place.
So, no matter if you want to register a PAN-OS 7.1 firewall or activate WildFire or or Panorama or anything in-between, you can find all this information on that page.