What is the significance when Googling gives you web site addresses that have tor dot onion or onion dot rip? I have never seen URL's formatted like that before just now.

4 answers

You cannot access Tor services or onion sites using your regular browser. They’re part of the invisible part of the internet known as the deep web. Or, more precisely, they’re part of the Tor darknet. Darknets are the bits you hear about in the news; an allegedly lawless area of the internet where anything goes.
bobpursley: What do you mean by allegedly?
yes
allegedly = supposedly or not proven.