Adwords’ users now have an additional feature that Google just launches which allows users to activate click to call phone number through mobile ads.  So what is this anyway?  If you’re activating this feature for your advertising campaign, visitors who visit websites that are using Adwords through high end smart phones could see your ad and your phone number; the trick is when a person clicks on the phone number inside the ad, his or her phone automatically places the call to your business.  Since more and more people could not step outside of their homes and businesses without having smart phones on them, and many smart phones nowadays have web browsing capability; the chance for your click to call advertising campaign to succeed is quite high.  Source.