This visualization displays a bubble chart comparing average job openings across primary skills, with bubble size indicating average skill demand score and color distinguishing each skill category. The chart, rendered as SVG using D3 v7, loads CSV data from a GitHub gist and aggregates records by primary skill using `d3.rollup` and `d3.mean`. It employs `d3.scaleBand`, `d3.scaleLinear`, and `d3.scaleSqrt` for positioning and sizing, `d3.schemeTableau10` for color, and `d3.axisLeft` and `d3.axisBottom` for axes. Interactive tooltips appear on mouseover, and a legend lists all skills with their corresponding colors.