Voice-of-customer research helps an operator write in the language people use for the problem. It does not make every public speaker a customer or establish permission to reuse their words in advertising.
Start with a specific product question and collect relevant public discussions within their terms and context. Retain the URL, date, quotation boundaries and whether the person describes an actual purchase or a hypothetical concern. Avoid collecting unnecessary personal details.
Map each supported concern to a real product fact, evidence and a draft response. Treat the angle as a hypothesis. A forum quote cannot substantiate a medical, comparative or performance claim the product does not otherwise support.
Review the resulting ad and destination together, then evaluate a bounded test. Track the actual exposure, conversion quality and contribution; using forum language does not establish an expected CTR or cost improvement.
Take the idea further
Build the source-to-copy matrix