From the Inside Adwords blog:
Earlier this year we launched click-to-call location extensions for search ads appearing on mobile devices with full Internet browsers. Today we’re excited to announce more ways location extensions can be used to connect with local users on the go, whether they’re using their phones to browse the mobile web or engage with their favorite mobile apps.
Many mobile consumers use maps to locate a business and get directions on their phones. With AdWords location extensions, you can now feature your business location and phone number on an expandable map ad that can appear on mobile websites and apps across the Google Display Network. The ad appears as a banner text ad with a business icon that expands to show your business location on a Google map along with your ad creative, click-to-call phone number and option to get directions. Since ads can be served based on the user’s location, a potential customer will see the phone number and map of the store location that’s nearest to them. By providing mobile consumers more options to connect with your business, you can drive more traffic to your store, visits to your website and calls to your business.
Learn more about the new Ad format for Mobile devices from the Inside Adwords blog.