Google is expanding ‘click-to-call phone numbers’ from mobile ads for national advertisers. Now advertisers can add a national phone number to the last line of ad text for any existing or new campaigns, making it easy for customers to connect with the business by phone directly from the ad, regardless of their location. This can be especially helpful when you're trying to connect with the business call center rather than a specific business location. After searching for a travel services, for example, you might want to call to discuss trip planning with an agent. Or after searching for car insurance, you might want to call for a quote. Now, if you're using an iPhone, Android device, or Palm Pre, you can just click the phone number to call the business without needing to navigate to a new page.