Product facts structured

Google's Product structured data (Product with Offer: price, availability, reviews and ratings) makes pages eligible for product snippets (pages where the product cannot be bought directly) and merchant listing experiences (pages where it can); adding the required merchant-listing properties also makes a page eligible for product snippets. Google recommends providing as much product information as is available, says structured data plus a Merchant Center feed maximises eligibility and helps it verify the data, and its general structured-data guidelines forbid marking up content that is not visible to readers of the page.