This book is targeted to a variety of readers. There are information workers and people who are totally new to the BI world. For those readers, the book acts as a simple introduction to the concepts that are the foundation of BI. Yet, another target category is that of IT professionals and database administrators who might need to drive the decisions of the company in adopting Power BI, because their users are asking for it. For them, this book acts as both a simple introduction to the basic concepts, explaining why users are so interested in Power BI, and as an overview of the capabilities and tools available in Power BI, so that readers can make educated choices in adopting it.
First impressions have a big impact on how others perceive you, so how you introduce yourself to others is extremely important. Many people call an introductory speech an elevator speech, because it should be succinct enough that you could introduce yourself and tell someone about your goals or interests in the time it takes to ride an elevator.  It may also be called an "icebreaker" speech, as it breaks the ice and lets others get to know you.  Consider your words carefully when you write a speech introducing yourself. Crafting a good self-introduction can either build or harm your credibility.