Communication as pivotal part of the human condition plays an essential role in bringing sustainability-related issues onto society’s agenda. Sustainability communication does not represent a somewhat discrete and self-contained theoretical approach, but rather draws on a wide range of disciplines, their bodies of knowledge, and their methodological approaches to illuminate the drivers and barriers of a broader and deeper societal engagement with the idea of sustainability. This chapter introduces students to the study of communication processes in the context of sustainable development. It suggests analyzing sustainability communication using a typology of three different communication modes: communication of, about, and for sustainability. The typology is applied in an illustrative way from the perspectives of two particular subsystems familiar to students, the educational system as well as the media system. The chapter concludes with an overview of relevant literature in the field of sustainability communication. The recommended readings cover three different types of literature highly relevant to students’ future studies in this field: introductory readings, practice-oriented readings, and current research.