Neapolitan in this case is their branding for shipping 2 pies. Every pizzaria will use terms like Neapolitan, and maybe something in them (the founder, the recipe, or who knows what) came from Naples, but the Neapolitan pizza is generally referring to a smaller pizza for one or two people that comes out of a much hotter oven (usually wood-fired) than what a slice joint has installed, and which is served and eaten fresh, not cut into slices and sold by the slice.