This example shows a stacked horizontal bar chart of app category ratings, displaying the percentage distribution of ratings across five bins from “below 2.0” to “above 5.0” for ten app categories. The visualization uses D3 v7 with SVG rendering, employing `d3.stack()` to compute stacked series, `d3.scaleOrdinal` for color mapping, and `d3.scaleBand` for categorical positioning. Tooltips on mouseover reveal exact percentages using `d3.format`. The data comes from a CSV file loaded and parsed by D3.