My preferred data visualization tool is Power BI. However, I believe the choice of tool depends on the specific project requirements and data characteristics. In my data visualization process, I adhere to a structured approach that involve understanding the data, defining objectives, selecting appropriate charts, data preprocessing, visualization design, iterative development, interactive elements, performance optimization, testing and validation, and documentation. Overall, my goal is to create data visualizations that are not only visually appealing but also impactful in conveying actionable insights to stakeholders and decision-makers.