What is a significant benefit of using data models in Power BI?

Using data models in Power BI provides a significant benefit by allowing for relationships between different tables, which is crucial for enabling complex analysis. When various datasets are interconnected through relationships, users can easily perform multidimensional analysis across those datasets, gaining richer insights and more comprehensive data storytelling.

By establishing relationships, users can leverage data from different sources without needing to combine them into a single table, often preserving data integrity and reducing redundancy. This relational aspect makes it possible to create measures and perform calculations that consider data across those tables, enhancing the analytical capability of Power BI.

While simplifying the data extraction process, improving the visual appeal of reports, and reducing the need for external databases are valuable, they do not directly address the core functionality of data models in facilitating richer, more intricate analytical possibilities through interconnected data.