Google introduced a new product for advertising named Google Click-to-Call. The new product is still being experimental in the USA only

Google Click-to-Call

We’re testing a new product that gives you a free and fast way to speak directly to the advertiser you found on a Google search results page – over the phone.

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.

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.

Google Click-To-Call

Greg Yardley have posted screenshots of the new Google Click-to-Call which shows how this new advertising looks like. An early usage of VoIP by google in advertising in a very innovative products that may interest many advertisers.