Tor Browser routes traffic through the Tor network and deletes all privacy sensitive information (such as the browsing history or cookies) at the end of each session. Additionally, it encrypts all traffic.

Privacy. It's fundamental. And this browser has enabled and keeps enabling people to lookup things they don't want their ISP/ government or surveillance marketers to see.
And what's better they won't know a thing about what you searched.
What is visible to the outside world, however, is the fact: if you make use of TOR and probably the TORBrowser, this client / citizen of ours is using TOR to obfuscate their traffic (=~anonymize).

If you follow their instructions religiously, Tor is the nec plus ultra in terms of safety and privacy. For the time being at least.