Google is checking yet another format for its Sitelinks for both the organic search results and the search advertisements. Here is a screenshot of the natural listings (click to increase the size of): Here it is of the Google Ads (click to enlarge): We recently saw a bigger Sitelinks box design both on Google Ads and the organic results.So I think Google is getting into the Sitelinks user interface screening again.Forum conversation at Twitter.

site-tuning