Neo4J is a popular graph database used by Cisco in their web-based applications, leveraging its advantages such as intuitive data modeling, improved performance, and speed to import data. Unlike relational databases, Neo4J stores data as nodes, relationships, and properties, allowing for easier modeling of complex information. With Cypher Query, Neo4J enables simple paths to find related information, reducing the need for joins and improving data performance. The database also offers various techniques for importing data, including Cypher statements, JDBC projects, and batch-import projects, making it an ideal tool for data migration and organization in high-performance environments.