Book excerpt: Involving the Audience: A Rhetorical Perspective on Using Social Media to Improve Websites examines the usability challenges raised by large complex websites and proposes ways the social web can expand usability research to address these new challenges. Using the website healthcare.gov as an initial illustration, Breuch explains how large complex websites are inherently challenged by open-ended, interactive tasks that often have multiple pathways to completion. These challenges are illustrated through two in-depth case studies, each addressing the launch of an interactive, complex website designed for a large public audience.