This visualization displays time-series data from an exam business dashboard, plotting hourly views as colored lines for different URLs with red circles marking Facebook engagement. The data comes from a Google Sheets CSV, rendered as SVG using D3 v5. The code employs d3.scaleTime, d3.scaleLinear, d3.scaleOrdinal, d3.line with curveBasis, and d3.nest to group data by URL, while axes use d3.axisLeft and d3.axisBottom with gridlines.