As mobile searches become more prominent, Google has addressed the advertisers needs. Google does have several ways that you can a) target mobile customers, and b) make it convenient for mobile users to contact you.
Since 1 in 3 mobile searches show local intent, one useful extension is the phone number extension – if you add it to your campaign, it creates a phone number that can be clicked to call your place of business directly.
Additionally, you can use the location extension to display how far the user is from your location and also to get a map directly to your place of business.
If you would like to learn more about these adwords functions or would like a consult on how mobile can work for you, please contact me here in Omaha. I am a Google adwords marketing expert.