Data modeling is critical for Power BI developers as it defines how data is structured and related within the system. A well-designed data model ensures efficient querying, accurate reporting, and optimal performance. Power BI developers must understand concepts like star schema, relationships, hierarchies, and normalization to organize data for maximum efficiency. Proper data modeling minimizes redundancy, reduces errors, and enhances report scalability, ensuring that reports and dashboards provide reliable, actionable insights.
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