A React starter example displays a large, centered "Hello React!" message on a plain white page. The project uses the React 18.2.0 library with the UMD production build, loading both `react` and `react-dom` from unpkg. The application creates a root element with `createRoot` and renders a functional component that returns a `div` element with the message text, styled using a CSS class with a 13em font size. The page structure is defined in `index.html`, with the component logic in `index.js`, which is compiled into a separate `bundle.js` file.