The primary features of a data visualization tool include the ability to transform complex data sets into intuitive visual formats like charts, graphs, and dashboards. These tools enable users to identify patterns, trends, and correlations quickly, enhancing data interpretation and decision-making. Customization options allow for tailored visualizations that meet specific needs, while interactivity fosters deeper engagement with data. By presenting information visually, these tools facilitate clearer communication and aid organizations in deriving actionable insights from their data.