What does the free software called Tor do?

The connection with an onion 🧅 is that a message is created, by a person, the message is encrypted and send to another computer, node, that computer, doesn't read the message it encrypts again and sends on. There are, normally, three nodes, each time making the origin of the message harder to be found. Each node wraps a new layer, like onion layers. It is one of the best non-professional security tools.

The operating system for the Dark Web .

TOR is NOT a web browser! It is a freeware anonymizing software router!