Description: Inline CSS is a method of applying CSS styles directly within HTML elements using the ‘style’ attribute. This approach allows styles to be immediately applied to a specific element, which can be useful for quick customizations and for reducing the number of HTTP requests to the server. By including styles inline, the need to load external CSS files is avoided, which can improve page performance, especially in situations where loading speed is critical. However, excessive use of inline CSS can lead to messy and less maintainable code, as styles are scattered throughout the HTML instead of being centralized in a CSS file. Despite its drawbacks, inline CSS remains a valuable tool in web development, especially for quick testing or in situations where precise control over the style of an element is required without affecting others. In summary, inline CSS is a technique that, while it should be used sparingly, can contribute to web performance optimization by reducing HTTP requests and allowing for quick style customization.