This D3.js visualization presents three charts from the retail_superstore_clean.csv dataset. The first is a bar chart showing total sales aggregated by category using `d3.rollup` and `d3.sum`, with axes rendered via `d3.axisBottom` and `d3.axisLeft`. The second is a scatter plot mapping discount against profit for the first 100 rows, using `d3.scaleLinear` for both axes. The third is a multi-series line chart displaying data from the first 200 rows. All charts render as SVGs within a single HTML page.