This example shows a smoothed radar chart comparing multiple entities across four axes, with values for hospital metrics and product attributes. The visualization uses D3.js version 3.5.6 to render an SVG with seven concentric grid levels, radial axes, and glowing area blobs that represent each data series. The chart applies a cardinal-closed interpolation for smooth blob outlines, includes a color scale for series distinction, and adds a glow filter via SVG defs. The legend and tooltip appear in the interface, with animated rendering handled through React starter code.