The GoogleBar is a control in the Maps API to allow users to search the map for local businesses, landmarks and points of interest. The new GoogleBar includes: greatly improved UI, and advertising targeted to the user's searches. This new feature will improve the user experience by providing targeted and relevant sponsored results, and you can benefit by sharing in the revenue of including these results on your site. You can see the new GoogleBar, together with ads, below:

More info: Maps API Blog