Neo4j is a graph database that is favored by enterprises and organizations for its ability to model and query complex relationships in data efficiently. It uses a query language called Cypher, which is praised for being intuitive and expressive, allowing developers to write queries that are 50-100 times more concise than equivalent SQL queries. Before using Neo4j, companies often struggle with complex join operations and slow performance when dealing with highly interconnected data in traditional relational databases. After adopting Neo4j, organizations report improved performance for relationship-heavy queries, easier data modeling for complex domains, and better scalability for large datasets. Neo4j is particularly valued in use cases such as fraud detection, network management, and social network analysis, where understanding connections between data points is crucial.