This visualization presents a horizontal bar chart ranking the top 12 products by total units sold from the retail sales dataset. The bar chart aggregates six months of data using d3.rollups and d3.sum to calculate product totals, sorting them in descending order. Bars are rendered as SVG rectangles with a linear gradient fill, and animated updates respond to user interaction. D3 v7 handles data loading via d3.csv, while a custom tooltip displays exact values on hover, enhancing the comparative analysis of product performance.