A hierarchical tree visualization displays product category data loaded from a JSON file. The layout uses `d3.tree` and `d3.hierarchy` to structure the data, with `d3.linkHorizontal` generating curved paths between parent and child nodes. Labels show node identifiers from the `label` field, while a `d3.zoom` handler enables panning and scaling of the SVG rendering. The visualization emphasizes the tree structure over numeric KPIs, which are present in the data but not displayed.