This visualization summarizes a 150-row CSV dataset of simulated digital behavior records, showing key performance indicators like average app usage time and sleep hours in a left-hand card. An adjacent SVG bar chart, built with D3.js v7, displays the distribution of social media platforms using aggregated frequency counts. The page loads the remote CSV via JavaScript’s `fetch()`, parses it with `d3.csvParse`, and computes rollups with `d3.rollups`. A scrollable preview table shows the first eight rows to verify parsing.