Power BI developmentinvolves several key steps: first, connecting and integrating data sources, such as databases, Excel, or cloud services. Then, the data is cleaned, transformed, and modeled using Power Query and DAX (Data Analysis Expressions). Developers create visualizations and dashboards that provide insights into key business metrics. Finally, reports are published, shared, and embedded within platforms like Microsoft Teams or SharePoint. Additionally, developers configure data refresh schedules, apply security measures like row-level security (RLS), and provide user training for effective report use.