Social tagging, a way for consumers to label and search for products and content on the Web, is now cropping up on mainstream eBusiness sites across industries, including retail, travel, financial services, and healthcare. As part of a larger trend toward social navigation, social tagging integrates the people power of Social Computing with search-and-browse navigation. This report answers eBusiness professionals' common questions about social tagging, including what it is, how it works, and how companies should manage quality control and user privacy.