FAQPage markup wraps each visible question and answer in Question/Answer types. For AI search it's disproportionately valuable: the format hands engines exactly the unit they compose answers from, which is why FAQ-marked content is preferentially cited by ChatGPT, Perplexity, and AI Overviews.
Requirements: the marked-up text must be visible on the page and identical to the schema, questions should be real questions users ask, and answers should be direct and self-contained (the first sentence should stand alone).