Bing Webmaster Tools is a free service provided by Microsoft that helps website owners manage their site's presence in the Bing search engine. It offers various features, including site performance analysis, keyword research, and the ability to submit sitemaps. These tools help users understand how their site is indexed and how to improve its visibility in search results. Users can also monitor their site's health, identify issues, and receive insights on how to enhance user experience. By utilizing Bing Webmaster Tools, webmasters can optimize their content and increase traffic from Bing, ultimately improving their site's overall performance.