Summary  
Treemaps visualize hierarchical data by dividing a container into nested rectangles whose areas encode one quantitative measure and whose colors represent another.

General domain of usage  
Business analytics

## Why Treemaps?  

Treemaps are particularly useful when:  
- Visualizing large datasets with hierarchical structures;  
- Quickly identifying the most profitable categories or areas with significant sales;  
- Spotting patterns and outliers within a category or subcategory.  

What does the size of rectangles in a treemap represent?

This streamlined beginner course focuses on the essential Tableau skills needed for business intelligence: connecting data sources, working with dimensions and measures, creating interactive visualizations, designing dashboards, and sharing insights. Each chapter includes practical tasks and projects for hands-on learning.