Building a portfolio is essential for Power BI consultant to showcase their skills. Start by working on personal projects or contributing to open-source data projects. Develop a variety of dashboards and reports for different business scenarios, such as sales, marketing, or financial analysis. Highlight your ability to handle complex data models, DAX, and Power Query. If you�ve worked on real-world client projects, include those in your portfolio, with permission. A well-organized portfolio on platforms like GitHub or personal websites can attract potential clients.