This document is an in-depth primer on service design by Florian Vollmer. It discusses the concepts of service, design, and service design. Service design is presented as a way to manage complexity and relationships by taking a systems-oriented and human-centered approach. The document outlines characteristics of service design like depending on facilitation, understanding business processes, and relying on user insights. Principles of service design discussed include focusing on the human, co-creating, sequencing, and taking a holistic and system-integrated approach. A taxonomy of service design tools and methods is also presented.