This area chart visualizes monthly website visitor counts using a time-series line that fills the space beneath it in steel blue. The SVG visualization is built with D3 v7, loading CSV data from a GitHub raw dataset. It employs `d3.scaleTime` for the date axis and `d3.scaleLinear` for the visitor count, while `d3.area` generates the filled path. Axis labels and a descriptive title are included for clarity.