To my understanding, it mean you write endpoints and only endpoints. You don't have to configure an OS, or even write the code that says "bind to port X and start". You just say "when you get this request, do this". Which is a neat abstraction! But there's still a server, you just don't have to manage it directly.
That makes perfect sense. Calling it "serverless" is kind of weird though. I can see the point from a marketing perspective but "serverless" is just such a weird term.
