This example presents a webpage that reports metadata about a mobile phone dataset. It shows the dataset’s size in kilobytes, the number of rows, and the number of columns, along with a link to view the raw data. The code uses D3 v7’s `d3.csv` to load data from a GitHub gist and `d3.csvFormat` to calculate the file size. The resulting message is displayed inside a `<pre>` element, while CSS sets a credit card image as the page background.