For more details see the Google Rich Snippets for Magento 2 extension page.
With the extension, you can greatly enhance your snippets in the search results. Add breadcrumbs, rating, price and more to highlight your web store and provide the customers with a better shopping experience.
Fixed Category Path - Enable extended breadcrumbs display on the product pages.
Enabled - Enable extended breadcrumbs display in the rich snippets.
Type - You can modify the breadcrumbs type for the search engine, specifying a short type:
Specify your Website Name to include it in Google rich snippets.
Specify Organization Name, Logo URL and other data to include it in the search results.
Add your Social Profiles to your Google Rich Snippets.
Display a handy Search Box in Google search results' snippets.
Enabled on Category Pages - This option adds average ratings of the products from the particular category and the minimal starting price to category pages.
Show Availability - This option adds the stock availability tag to product rich snippets to let customers know whether the product they are looking for is in stock right from Google search results.
Show Condition - This option adds the new condition tag to product rich snippets
Show Configurable Products as a List of Simple Products Offers - the feature lets Google mark all the simple products of configurable one in the relevant way, thus the simple products are shown in the search results as offers.
Show Grouped Products as a List of Simple Products Offers - lets Google mark all the simple products of grouped product and suggest them as offers in the search result.
Description - Select what sort of description to include in rich snippets: Product Short Description, Product Full Description, Page Meta Description.
Show Rating - Enable rating in rich snippets.