The significance of cross-device compatibility in web design lies in its ability to ensure that websites function seamlessly across various devices, such as smartphones, tablets, and desktops. This compatibility enhances the user experience by providing consistent access to content and features, regardless of the device used. As more users shift toward mobile browsing, responsive design elements become crucial for optimizing navigation and viewability. Additionally, search engines prioritize mobile-friendly sites, making cross-device compatibility pivotal for SEO and overall digital presence in today’s competitive landscape.