Digital badges are studied and implemented for a variety of purposes. Regardless of the specific application, all badges have one thing in common: they contain explicitly designed information meant to motivate users. This information is created by the badge's developer, transferred using the badge as a vessel, and assimilated by the user. In other words, badges are devices for communication. This article examines this communication process within social environments from three different perspectives---badges as rewards, feedback mechanisms, and narrative. For each of these perspectives, this article provides examples and discusses the type of information that can be communicated as well as the design considerations required for successful communication.