This visualization shows total global video game sales for each platform using a bar chart, with platforms sorted in descending order of sales. It loads a CSV dataset containing video game sales figures and aggregates the data by platform using `d3.rollup`. The chart renders with SVG, using `d3.scaleBand` for the x-axis and `d3.scaleLinear` for the y-axis, while `d3.axisBottom` and `d3.axisLeft` generate the axes. Bars are drawn as SVG `rect` elements with a steelblue fill, and the x-axis labels are rotated 45 degrees for readability.