This visualization displays the number of purchases for the top fifteen revenue-generating brands in an online sales dataset, using a horizontal bar chart. The revenue totals appear on the y-axis, while purchase counts are mapped on the x-axis. Built with React and D3 v5, the chart uses `scaleBand` and `scaleLinear` for positioning, with SVG `rect` elements for bars and custom tick rendering. Data is loaded asynchronously from a CSV file via `d3.csv`, and the visualization includes blue grid lines to aid value comparison.