This sankey diagram visualizes the flow of notifications from a total source through matched and scrap categories, with values displayed for each link transition. Built with React and rendered as SVG using D3.js v3, the visualization loads data from a JSON file containing node and link definitions. The diagram employs the custom `d3.sankey` layout API, which handles node positioning and link thickness calculation through iterative layout algorithms, while CSS styling controls the visual appearance of nodes and links.