Responsive web design is crucial for mobile devices as it ensures that websites adapt seamlessly to various screen sizes and orientations. This approach enhances user experience by providing easily navigable layouts and readable text without requiring excessive scrolling or zooming. A responsive design improves accessibility, making content available to a broader audience on diverse devices. Additionally, search engines favor responsive sites in rankings, boosting SEO performance. With mobile traffic continuing to rise, responsive web design is essential for maintaining relevance and usability in the digital landscape.