Sitemap is a special XML file that provides explicit URLs to search engine crawlers to help index your site. A good sitemap file plays an important role in your overall SEO success. It should include all your public Web pages as well as products you sell.
Revindex Storefront automatically includes all your published products into your portal sitemap file. There is nothing to configure. You can verify your sitemap under your persona bar's Settings > SEO page. Sitemap files are cached, therefore, you may need to clear the cache data to see the changes the first time. In addition, you can submit your sitemap file to Google or just wait for Google to periodically index your site and read your sitemap file.