Google Express is a marketplace like Amazon, where you do not pay per click, but rather commission to Google. The sale happens on Google.com, not via your website on Google Express, whereas with Google Shopping, the sale happens on your website.
Brian Roizen is the Cofounder and Chief Architect of Feedonomics, a full-service feed optimization platform that optimizes product data for hundreds of channels. He has been featured on numerous podcasts and eCommerce webinars, and regularly contributes to Search Engine Land and other industry-leading blogs. Brian graduated summa cum laude from UCLA with both a Bachelor’s and Master’s degree in Mechanical Engineering.