This pie chart displays the sales distribution by product, with real-time data updates fetched from a remote CSV file. The visualization uses D3.js v7 to construct the pie, with animated transitions for slices, labels, and a color-coded legend. Users can hover over slices to see a tooltip showing the product label and its percentage value. The SVG-based chart also includes interactivity through mouse events and uses d3.pie, d3.arc, and d3.scaleOrdinal for data binding and rendering.