This tree visualization displays a four-level hierarchy of LinkedIn job postings, organized from the root node down to companies, locations, and job types. The D3.js v7 code builds the structure using `d3.tree` and `d3.hierarchy`, with SVG links drawn via `d3.linkHorizontal` and custom node shapes selected by depth—diamond, circle, square, and star—through `d3.symbol`. Data appears hardcoded in the HTML file, showing fictional postings for Crocs and Stealth across multiple cities.