Mobile-first web design emphasizes starting the design process with mobile devices in mind, rather than adapting desktop designs to fit smaller screens. This approach, which gained prominence after Google’s then-CEO Eric Schmidt highlighted its importance in 2010, is increasingly crucial as mobile usage continues to rise, accounting for a significant portion of internet traffic. Mobile-first design prioritizes essential elements on small screens, enhancing user experience and meeting the expectations of a growing number of internet users who access the web solely through mobile devices. Unlike responsive design, which adapts desktop-oriented designs to mobile, mobile-first design begins with the constraints of smaller screens, ensuring a seamless experience across all devices. With search engines like Google favoring mobile-optimized sites and the potential for increased user engagement, businesses are encouraged to adopt mobile-first strategies to maintain relevance and improve conversions. The article also highlights practical tips for implementing mobile-first design, such as simplifying design, optimizing call-to-action buttons, refining navigation, and continuously testing across various devices and screen sizes.