A neon sign effect renders the text "Hello HTML" in large, glowing letters using CSS text shadows and the Google Font "Bungee Inline." The page sets a dark background and applies layered text-shadow values to create a multi-colored glow, with pink and blue hues. The example demonstrates styling text purely through CSS properties, including font-family, letter-spacing, and text-shadow, without any JavaScript. It loads the font via the Google Fonts API and uses inline CSS in a single HTML file.