In this chapter, we discussed the background material for Neo4j specifically, as the world's leading graph database and the topic of the rest of this book. This included an overview of Neo4j's specific implementation of the graph database concepts, its sweet spot use cases, its licensing model, and its installation and deployment considerations. This should give us the required background to get going with the hands-on part of this book. This is what we will start to address now, and the next chapter will help you to model your data in the right way that is fit for Neo4j.