Websites can use responsive design to enhance user experience by ensuring that the site adapts to various screen sizes and devices. This approach utilizes flexible grid layouts, images, and CSS media queries to create a seamless experience whether users access the site on a desktop, tablet, or smartphone. Responsive design improves accessibility and navigability, making it easier for users to find information. Additionally, it can boost site performance and improve SEO rankings, as search engines favor mobile-friendly websites. Overall, this design philosophy promotes user satisfaction and engagement.