Thanks for asking! So if you don't know TOR, it's basically a clever way to send your encrypted network traffic through multiple servers before it reaches a website. That way the website host wouldn't know who requested it and thus you get better privacy. It's a very simplistic way to explain it so I'd encourage you to google or chat gpt it if you want to know how it really works.

So what the relays on this list has done, is to expose the relay to the TOR network which is kind of similar to exposing it to the internet through a domain name (such as relay.damus.io e.g.). Again, a very simplistic way to look at it but I hope that makes sense.