Questions relating to Tor Hidden Services
Normally, Tor protects the anonymity of clients visiting a website or other internet service. However, it also provides a mechanism to protect the operator of a server. This is called a 'hidden service'. Hidden services are given a generated domain name in the
.onion pseudo-top-level domain and are only routable via the Tor network unless a Tor-to-web bridge service is used.
Hidden services are most often used for web sites, but can be used for any TCP based internet service.