Neo4j is a graph database platform for connected data. The document introduces Neo4j and discusses how connected data and relationships between data are increasingly important for business value. It provides examples of how Neo4j is used by organizations for applications like fraud detection, personalization, and network analysis. The document also summarizes Neo4j's capabilities like real-time transaction processing, analytics, and visualization and highlights its native graph architecture and performance advantages over traditional databases. Finally, it briefly describes Neo4j's key architecture components and how it can be used for common data architecture patterns.