This example visualizes Spotify Premium subscription price increases from 2024 to 2025, comparing "vorher" and "nachher" prices for four plan types using grouped bar charts rendered as SVG. The chart uses D3 v7 scales, axes, and grid lines within a React framework, with interactive tooltips on hover showing specific prices. Data is hardcoded, and a dark theme with green accents highlights the comparisons, supported by summary statistic cards displaying absolute and percentage increases for each plan.