Schema FAQPage và HowTo: viết JSON-LD khớp HTML để AI Overviews trích đúng

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Many teams add a JSON-LD block for FAQ schema and assume that completes their AI Overviews optimization, but a passing Rich Results Test can still hide mismatches between the markup and the visible page. The article argues that schema does not replace indexing or the presence of content in the raw HTML, since AI bots often ignore anything injected by JavaScript. FAQPage suits pages with real customer questions where each answer stands alone, while HowTo fits ordered processes like implementation steps, and the schema text must match the on-page wording nearly word for word. Common errors include marketing-style FAQs that visitors never ask, answers in the markup that differ from the visible copy, and duplicated or copied schema left unedited. The author recommends a quick curl check to confirm the JSON-LD appears in the initial HTML before deployment.

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