Improved Data Integrity: Relationships in a database help to ensure that data is consistent and accurate. By linking related tables, data can be updated in one place and automatically updated in all related tables, reducing the risk of errors and inconsistencies.

Efficient Data Retrieval: Relationships allow for efficient data retrieval by enabling users to access related data from multiple tables with a single query. This saves time and reduces the need for complex and time-consuming joins.

Scalability: Relationships in a database make it easier to scale and expand the database as needed. By breaking data into smaller, related tables, it is easier to add new data and tables without disrupting the existing structure. This makes it easier to manage and maintain the database over time.