Structured data and schema markup, explained
Schema markup is a vocabulary that describes what a piece of content is: a recipe, a review, a question and its answer, a step in a process. It doesn't rewrite your content or guarantee a placement anywhere. What it does is remove ambiguity that a machine parser would otherwise have to guess at.
FAQPage, HowTo, and Article schema show up frequently in conversations about AI-generated answers, likely because they map cleanly onto the question-and-answer format those systems tend to produce. Below is an illustrative example of how a completeness scale might be represented for a single page's structured data, purely as an example of the concept rather than a measurement of any real site.
Example only. Not a measurement of any specific page or business.