Google announced on Google+ a new callout extension now available for AdWords. It is called Dynamic Callout Extensions and it will automatically highlight useful information about your business or the products you offer in the extensions area of your ad.

Google said:

Here is an example:

In this example the advertiser’s landing page mentions potentially useful information like “25 years of experience,” “Book online,” and “Certified technicians.” With dynamic callouts, this callout text will dynamically appear beneath your ad text, at the top and bottom of Google search results.

Forum discussion at Google+.