The author is stating the specific Apple Intelligence term is not one specific feature or app, it’s a collection of all related features, like Continuity.

It’s a fine idea for Apple to brand its AI features under an umbrella term like that, similar to how a bunch of disparate features that allow different Apple devices to interoperate are under the “Continuity” umbrella. But there’s no such thing, technically speaking, as “Continuity” … It’s a marketing term, but a useful one — it helps Apple explain the features, and helps users understand them.