The document discusses database normalization. It defines database normalization as restructuring a database to eliminate redundancy, organize data efficiently, allow faster access, and reduce data anomalies. It then covers the goals of different normal forms (1NF, 2NF, 3NF, BCNF), defines key database concepts like primary keys and foreign keys, and gives examples of how to normalize relations to those forms. The document concludes that normalization decreases redundancy and increases efficiency.