Data Preparation in Power BI: Cleaning, Transforming, and Loading Data for Real-World Analytics

Introduction Before any dashboard delivers value, there’s a quiet but critical phase every analyst must master data preparation. In Microsoft Power BI, this happens inside the Power Query Editor, where raw, messy, inconsistent data is shaped into something reliable and analysis-ready. If you’re building a career in data analytics, this is not optional. Dashboards don’t fail because of visuals, they fail because of poor data preparation. In real-world scenarios, data comes in different formats (E