Of course, this is one of the big money-making markets for Google. You can see it in the number of rich results, there are a ton of them. The product-related rich results range from relatively simple highlighted search results with star ratings and prices, to big knowledge panels and the like. In addition, you'll find products in Images and Google Shopping -- not to mention all the ads. Where Google gets its data depends on the type of listing, but you can bet on it that most of it depends on Product Schema. If your online store runs on WooCommerce, our WooCommerce SEO plugin automatically improves the code outputted by your site. We also have a post on products Schema, plus you can find more information in Googles documentation on Products.