This example visualizes the distribution of discussion topics in a school-related CSV file as a doughnut chart. It shows the percentage of occurrences for categories like quiz, homework, exam, and lecture recording, highlighting which topics are most frequently mentioned. The code fetches CSV data via the Fetch API, parses it with JavaScript string methods, and counts keyword matches before converting counts to percentages. It renders the chart using Chart.js from a CDN, drawing the doughnut visualization on an HTML canvas element with distinct color schemes.