Monero is fucking genius actually, I recommend reading about the cryptography and mathematics behind it, it's actually incredible.
Basically, they've created a way to make the entire thing opaque. Even the people sending the coin are unable to identify the person they're sending to.
I don't hold any Monero, because I don't see it as a good investment (no way governemnts allow something that powerfully opaque to thrive), but I respect the technology.