What exactly is "Activation" on the initial page?

When I pushed the Activate button, the system returned a failure.

What are the “Activation” tasks?

  • Is there a test that can be performed to ensure all Activation tasks are completed?
  • Can I somehow summon the web page so as to try to push the Activation button again?
  • Somehow “Activate” from the terminal command line?

I copied this screenshot form another posting: