The visualization displays a horizontal bar chart ranking the populations of 30 countries in 2020, using a green fill for each bar and blue tick marks on a white background. Built with React and D3 version 5, it loads CSV data from a GitHub repository, transforms it with the `csv` function, and renders SVG rectangles via the `scaleBand` and `scaleLinear` scales, with axes drawn by custom `AxisBottom` and `AxisLeft` components.