Price Extensions in AdWords was introduced by Google last July, which showed prices on types of products and services in text ads. The extensions are currently available to show on all devices, and not just mobile.
Here’s an example that Google had provided. It shows three price extensions in the desktop version.
This format is similar to the cards that is being used in the mobile format, which uses swipeable cards that has been around since November.
Now, Advertisers have the option of setting separate mobile mobile URLs for price extensions.