Google newest service: Click to call
Google is testing a new product that gives you a free and fast way to speak directly to the advertiser you found on their search results page – over the phone. When you have the opportunity to do it, you'll see a small phone icon. You only have to click on it to get in touch with the advertiser.
From their website:
Here's how it works: When you click the phone icon, you can enter your phone number. Once you click 'Connect For Free,' Google calls the number you provided. When you pick up, you hear ringing on the other end as Google connects you to the other party. Then, chat away on our dime.
We won't share your telephone number with anyone, including the advertiser. When you're connected with the advertiser, your number is blocked so the advertiser can't see it. In addition, we'll delete the number from our servers after a short period of time.