Load it and it fingerprints your browser. You can add a signature to that fingerprint.
Make whatever changes you want to make to resist fingerprinting and reload the page. If it displays your signature then it has identified you, if not then your changes worked.
Ideally, every page refresh would generate a new unique fingerprint so the page can’t link you to the last time you loaded the page (which is what tracking is, essentially)
The site also displays all of the data that it can see, for advanced users
He’s telling you that your social skills are terrible.
That may work on Reddit where you’re effectively anonymous and people upvote edgy or outrageous comments but in smaller spaces if you’re being an asshole then expect people to treat you like an asshole.