Augmented and virtual reality are media innovations with specific characteristics. They create immersion in the user, as the user is immersed in the medium and its 360° environment. To successfully develop content and applications for AR and VR, psychological effects, the specifics of the 360° environment, the story, and the way the media is used must be aligned with the needs and experiences of the user. Content producers face novel challenges in content development, method selection, teamwork, and the overall production process of AR and VR experiences. The book introduces readers to the characteristics of immersive media and provides scientific evidence and practical tips to help them produce high-quality, user-centric content for immersive media. The scientifically derived success factors in the form of checklists are a guide and an ideal basis for standardizing the production process and further developing one's own projects. This book is a translation of the original German 1st edition Medieninnovationen AR und VR by Elle Langer, published by Springer-Verlag GmbH Germany, part of Springer Nature in 2020. The translation was done with the help of artificial intelligence (machine translation by the service DeepL.com). A subsequent human revision was done primarily in terms of content, so that the book will read stylistically differently from a conventional translation. Springer Nature works continuously to further the development of tools for the production of books and on the related technologies to support the authors.