Just this week, Google introduced a new feature: instant preview for ads.
When you conduct a Google search, you’ll notice a magnifying glass now appears to the right of the title of all search results — both paid search and organic search.
When you click on the magnifying glass next to a search result, you’ll see an instant preview of the site pop up. The preview includes a downsized image of your landing page, plus a call-out that Google has generated to highlight a particular piece of information on the page.
Here’s a screen shot so you can see what the new instant preview feature looks like (I’ve made notations in red):