A hierarchical network graph visualizes global tech layoffs, showing the top five companies per continent. The visualization uses D3.js v6 with `d3.forceSimulation` to position nodes by force-directed layout, linking continents to countries and then to specific companies like Google, Spotify, and MercadoLibre. Node circles are rendered as SVG elements with text labels, while links are drawn as lines with arrow markers. The data comes from a JSON file containing hierarchical relationships, and nodes are colored cyan with red borders, with hover effects highlighting selected nodes.