Google advertisers can now add click-to-call phone numbers to their mobile ads. The move expands the offering from just local advertisers to national advertisers.

The setup is quite simple and means that all advertisers running mobile ads can add a phone number via the adwords phone extensions menu (make sure to select the “iPhones and other mobile devices with full Internet browsers” campaign option as well).

Following setup, advertisers with phone numbers associated with their ads will gain access to data on how many calls they receive per keyword, ad group or campaign.

On the user side of things, iPhone, Android and Palm Pre device owners should start noticing the national and local Google ads with click-to-call phone numbers at the bottom.

Obviously the type of phone number advertisers employ will vary, with some businesses being more call-friendly than others, but we’re certainly intrigued by the idea of searchers directly contacting advertisers. The mainstream adoption of social media by businesses has proven that customers are looking for more direct access to companies, so we’re curious to see if this same idea translates in mobile ad form as well.

Tags: Google, google adwords, Google mobile, MARKETING, Mobile 2.0