A Power BI Professional may have the following skills and responsibilities:

1. Data Visualization: Creating visually appealing and interactive dashboards and reports using Power BI’s drag-and-drop interface.

2. Data Modeling: Designing efficient data models to handle complex relationships between different data sources, ensuring data accuracy and consistency.

3. Data Integration: Connecting to various data sources, such as databases, Excel files, cloud services, etc., and transforming the data for analysis.

4. DAX (Data Analysis Expressions): Writing DAX formulas to create calculated columns, measures, and other advanced calculations in Power BI.

5. Report Development: Designing and building comprehensive reports that meet business requirements and provide actionable insights.

6. Data Analysis: Analyzing data trends, patterns, and anomalies to extract meaningful insights for decision-making.

7. Data Governance: Implementing security measures and data access controls to ensure data privacy and compliance.

8. Data Sharing and Collaboration: Sharing reports and dashboards with colleagues and stakeholders, enabling collaboration and data-driven decision-making.

9. Performance Optimization: Identifying and addressing performance issues in Power BI reports and queries to improve responsiveness.

10. Training and Support: Providing training to users, troubleshooting issues, and supporting Power BI adoption within an organization.

11. Continuous Learning: Keeping up-to-date with the latest features and updates in Power BI and data visualization best practices.