Well, the short answer is that it's like a combo of the better aspects of Facebook and Twitter, but with some latent MySpace elements and a strong focus on privacy. It has a newly decentralized architecture, as well. No offense to Nostr, but I find it to be the best place to hang out online, as it's one of the few places where I still get that 'old web' feel.
Of course, I'm an ambassador for the company so I'm a *little* biased, but yeah, I definitely recommend everyone check it out as long as they're not Nostr-only haha