This example demonstrates a clustered bubble chart with interactive tooltips, using sales data from a CSV file. It visualizes two facets of the data side-by-side: one chart sizes bubbles by "Total Profit" and another by "Total Cost", with each bubble labeled by country. The visualization uses D3 v7's `d3.pack()` layout algorithm to create the cluster arrangement, and implements custom tooltips via HTML elements that display country and profit or cost details on mouseover. The code employs D3's `d3.csv()` to import data from a remote gist, and renders resulting SVG circles and text labels within a React framework, with styling applied through CSS.