The stacked area chart displays website traffic sources—Organic Search, Direct, and Social Media—across months, with cumulative visitor counts visualized as colored regions. Areas are rendered by stacking Y values for each category using `d3.area` and `d3.stack` with custom x and y scales, while axes and labels are added via `d3.axisBottom` and `d3.axisLeft`. The visualization loads CSV data with `d3.csv`, applies an ordinal color scale, and includes a legend. The SVG output is styled with CSS, using a clean layout with margins for labels.