This example displays a large, centered "Hello VizHub!" message rendered in the browser, demonstrating basic D3.js usage and ES6 module imports. The code imports the `select` function from D3 v5 and a `message` string from a local `myMessage.js` module, then sets the text content of the `#message` div. Styling is applied via an external `styles.css` file, which centers the text and sets its font size to 12em, while the HTML page loads D3 from a CDN before executing the bundled JavaScript.