This example demonstrates the fundamental structure of an SVG-based web page, displaying a large "Hello HTML!" message centered in the browser window. It uses plain HTML div elements with CSS styling for layout, including a 13em font size and text alignment. The code relies on vanilla HTML5, CSS, and JavaScript, with no external visualization libraries or data sources. It serves as a minimal starting point for understanding basic web rendering before introducing more complex SVG or React-based visualizations.