A social network graph displays eight people as blue circular nodes connected by directed arrows, with edge thickness indicating relationship strength via the `value` attribute. The layout is computed using `d3.forceSimulation` with link, charge, collision, and center forces, while nodes are draggable via `d3.drag`. Hovering highlights a node by changing its stroke. Data is loaded from an external JSON file, and the SVG rendering uses D3 v6 selections, `scaleOrdinal` for color, and marker elements for arrowheads.