Summary  
This chapter explains how to implement a stacked area chart by mapping data values to the horizontal and vertical axes, stacking colored category areas to show each category’s contribution and overall trends over a sequence.  

General domain of usage  
Time-series trend analysis (e.g., tracking sales across product categories)

A **stacked area chart** in Tableau is an effective visualization for showing changes in data over time while highlighting the contribution of each category to the total value. It is especially useful when analyzing **trends and proportions** within the overall dataset.  

Here the key features of stacked area charts:

## Why Stacked Area Charts?  

Stacked Area Charts are particularly useful for:  
- Tracking changes in data over time across multiple categories;  
- Visualizing the proportions and contributions of individual categories;  
- Analyzing trends within a dataset while maintaining visibility of the total values.

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.