What do companies like Google, Uber, Trello, LinkedIN, Huawei, Flixbus or Holiday Check have in common? They all belong to the successful companies that use OKR profitably and for whom OKR makes an important contribution to their corporate success and goal achievement. OKR is a simple, agile approach to setting and implementing strategies in companies that is optimized for complex market situations. Particular attention is paid to not only transferring goals to individual employees in a goal cascade, but also to supporting teams in achieving goals together in synergy in a much more sustainable and secure way than each employee could do alone. OKR is a framework that can be used successfully for any size of organization and works optimally with agile frameworks such as Scrum, Kanban, DevOps and the like. This book concisely and to the point brings the most important information about what OKR is, what advantages and disadvantages it offers, what elements it comprises and how the process model of OKR works. It presents the role of the OKR master and his tasks and shows important aspects for an OKR implementation.