All this does is force the browser to use Bing as a search engine. The space it takes up in your toolbar is for a bing logo that shows you a clip of todays homepage but offers ZERO functionality.
Microsoft Bing Search Extension is a great way to enrich your search experience on Safari. Install this extension to stay up-to-date with the latest trending searches and suggestions. Access to information across the web is right at your fingertips with direct access to Microsoft Bing search. So go ahead, and install the extension now!