Google had added Instant Preview options for mobile and video recently. The company is now running experiments on Instant Previews for Ads. The Instant Ad Previews, just like other previews (mobile and video), lets users to preview the destination landing page of the given link for an ad before clicking it. Instant Ad Previews also has the magnifying glass icon on which the user must click to view the preview.
The preview of the landing page that appears after you click the magnifying icon on the right side of the also has the orange boxes that highlights the search query. For instance, run a simple 'dell alienware' search at Google.com. The returned results have a magnifying glass next to the ad (on the right). If you click on it, you can see the preview of the landing page that contains your all or some or one of the keywords of your query. Google highlights them in the preview window using the orange boxes, offering a quick and easy way to spot your query.
A user opines that “It could optimise PPC wastage but I am not sure if the majority of users will notice the feature.” While another commented that it is a “Good way of forcing advertisers to point their ads to relevant landing pages and optimize their copy. LOVE the orange boxes.” at Search Engine Watch. Well, if you can see it in your area, try it and find out how useful it is.