A treemap is a hierarchical visualization that uses nested rectangles to represent data. The size of each rectangle represents a quantity, while the hierarchy is shown through the nesting of rectangles within larger rectangles.

• Visualizing hierarchical data structures
• Comparing proportions across different categories
• Analyzing part-to-whole relationships
• Identifying patterns in nested data
• Showing space utilization or resource allocation

• Limit hierarchy levels to maintain readability
• Use clear color coding when representing additional variables
• Include meaningful labels and values
• Consider the aspect ratio for better visualization
• Provide interactive features for exploring detailed information