Instant Previews for Ads, which we reported was being tested last week, are now live in the U.S.
AdWords advertisers will only be charged when a user clicks through to your landing page, not if someone previews the page by clicking on the small magnifying glass next to the ad title, Google announced via Inside AdWords.
Google users can simply click on the magnifying glass next to the +1 button -- if they even notice it -- to preview the page. Just as with regular Instant Previews, which debuted in November, call outs (the orange boxes) highlight the relevant content based on the search query.
Instant Previews for Ads will roll out internationally in coming weeks.