This visualization displays an API heatmap of 20 companies, each represented by a tile showing a ticker symbol and relevance score. The code uses a d3.scaleLinear color scale with a three-color gradient from gray to teal to dark green, rounded to 0.5 increments. Tiles are rendered as SVG rectangles with mouseover tooltips showing company details, while a legend indicates the vector score range from 0 to 10. The data comes from a remote JSON file containing company symbols and metadata from the ms_industry dataset.