This stacked bar chart shows sales distribution across six product categories, broken into five rating ranges from less than 5 to greater than 8.5. The visualization uses D3 v7’s `d3.stack()` to create the layered bars and `d3.scaleBand`/`d3.scaleLinear` for axes. An interactive tooltip appears on mouseover via D3 event handlers, displaying the sales segment value. Data loads from a CSV file, with a custom color scale for each range and a legend rendered alongside the chart.