The benefit of using responsive web design lies in its ability to create websites that adapt to various screen sizes and devices. This ensures a seamless user experience, whether on a desktop, tablet, or smartphone. Responsive design improves accessibility and usability, catering to a broader audience. Additionally, search engines like Google favor responsive sites, which can enhance a website's SEO ranking. Overall, employing responsive design leads to better user retention and engagement, crucial in today’s mobile-centric digital landscape.