This example demonstrates a minimal React application that renders two static text blocks, “Stuff” and “Stuff two,” centered on the page with a large font size. It shows how React 16.13.1 and ReactDOM work together to mount a functional component into a DOM root element. The code imports React and ReactDOM, defines an `App` component returning JSX, and calls `ReactDOM.render` to inject the component into the `#root` div. Styling is applied via a plain CSS class, with no external data sources or interactive behavior present.