Google has introduced buttons to the product card listing ads towards the right hand side of the desktop search results interface.
The buttons are displayed when the Google results show a Google shopping card or panel towards the right side of the desktop search results. When you select one of the buttons, an overlay displaying more information pops up covering the search results.
The features included within the new product card buttons are similar to that of the ones used within Google mobile search, but the interface is a different appearance for desktop search.
For advertisers, this can only be a positive update, as users now have another way to see your products within a search for Google Shopping results.