The chart displays the population of the ten most populous countries as horizontal bars, sorted by value. Built with D3 v5, it loads data from a CSV file and renders the visualization as SVG. The code uses `d3.scaleLinear` and `d3.scaleBand` for axes, `d3.axisLeft` and `d3.axisBottom` for ticks, and `d3.format` to abbreviate population numbers with a custom replacement of 'G' with 'B' for billions.