Yesterday afternoon Google’s search engine results page (SERP) included clickable menus for select websites.  Here is a screenshot: If you click on a menu item, it loads another group of links.
Why would Google include menus in its search results and what are the implications for searchers, advertisers, and website owners?
First, these menus produce a better experience for searchers. You can quickly find the most relevant pages from within Google’s search results.
This saves you time. This feature also benefits advertisers and Google. If users are spending more time browsing Google’s search results they are probably more likely to see and click on a sponsored result. Higher click-through rates on ads equates to more revenue for Google.
Full Article: http://blog.intigi.com/google-launches-serp-menus/
Via Antonino Militello