This example displays a centered "Hello React!" message in oversized, 13-em text. The code uses React and ReactDOM to render a single functional component into a DOM element with the ID `root`. Styling is applied via a `.message` CSS class that sets the font size and text alignment. The page loads React 16.13.1 from a UMD CDN bundle, and the JavaScript is bundled separately into `bundle.js`. The visualization is a minimal demonstration of React’s component rendering and styling capabilities.