The primary benefit of using a relational database management system (RDBMS) is that it enables efficient data organization and retrieval through structured tables and relationships. By employing a structured query language (SQL) for database operations, RDBMS allows users to perform complex queries to manage data. The relational model ensures data integrity, avoids redundancy through normalization, and facilitates data consistency across systems. Moreover, features like transaction management enhance reliability and security, making RDBMS a popular choice for businesses that require robust data management solutions.