Yes, it's much more than that, since it's the underlying protocol, and it can be used for different things.  The protocol is simple but understanding how it works is being a little hard for me, hehe.

I'm also learning and fascinated by its simplicity.

In my opinion, it's more than just a social network. Social network is just the most obvious use-case of what can be achieved with it. 

nostr

nostr.info What is going on in nostr. Stats, Charts, Live Monitors, Resources...

nostr - Notes and Other Stuff Transmitted by Relays
The simplest open protocol that is able to create a censorship-resistant global "social" network once and for all.

It doesn't rely on any trusted central server, hence it is resilient; it is based on cryptographic keys and signatures, so it is tamperproof; it does not rely on P2P techniques, therefore it works.

From https://github.com/nostr-protocol/nostr

By @fiatjaf

I'm starting to learn all the possibilities it offers and how it works.
It's amazing!
