I have been teaching DAX to anyone who wants to learn since 2014 via face-to-face live training classes, live online training classes, video-on-demand training, and my own books and blog articles. We are all on a journey of continuous learning and improvement. Over the years, I have learnt more about the DAX language and also learnt new and better ways to explain the concepts to those who are just starting out. This third edition of my best-selling book Supercharge Power BI provides the same structured learning experience as the previous editions but has been updated with my latest teaching techniques. Anyone can get started with Power BI by downloading Power Bl Desktop, loading some data, and building a report. But with this basic approach, you can only scratch the surface of Power BI's capabilities. If you want to be able to supercharge Power BI, you need to learn to write DAX. Data Analysis Expressions (DAX) is the formula language of Power BI and Power Pivot for Excel. With the help of a good book that prompts readers to put their new skills to the test, Excel users can rather quickly learn the required DAX skills. This is such a book, written to give you hands-on practice using Power Bl Desktop and writing DAX. Inside you will find explanations of concepts, examples, and practice exercises and answers to maximize your experience and learning retention. When you read and complete the exercises in this book, Supercharge Power BI, you will be learning how to supercharge Excel at the same time. The DAX language is fully transferable to Microsoft Excel.