Actually, it's none of the above. But the supermarket's own brand is all of the above, and it's in a bigger jar, and it's much, much cheaper, and tastes exactly the same! Love chocolate spread.
Seriously though, my middle son (and I) love it for breakfast on toast, or on sandwiches for lunch. We don't really have it for tea (dinner, supper, whatever you choose to call your evening meal!). I don't let him have it all that much, as it is chocolate after all! I prefer them to have something more balanced, with some salad hopefully.
I don't think of Nutella as a dessert at all - how would you eat it as a dessert? On sweet waffles I suppose. Or to top a cake? I don't know. It's for putting on bread in our house :)