Created by the CIA and they control a large portion of the exit nodes but if you know what you're doing it's a valuable tool.

You got any tips mate?

The one tip i got is don't ever use it to access anything that's in your name, don't log into your Facebook etc. If you are using it for nostr only use it for an account that's not tied to your identity and don't log into that account without it. That's the main safety thing I actually remember. Nothing you do over tor should ever be tied back to your real identity. Even if it's completely legal stuff.