Describes something for sale — price, availability, brand and rating — enabling price and star-rating rich results in search.
Product schema is what puts a price and star rating directly in a Google search result, before anyone clicks through.
Paste the generated <script type="application/ld+json"> snippet into the <head> of the page it describes.
Fill this in and copy or download the snippet directly — the same generator lives in the full Structured Data builder alongside the other 6 types.