A mobile site viewer is a tool designed to preview and analyze how websites appear on various mobile devices. It simulates different screen sizes and resolutions to ensure that your site is responsive and user-friendly across smartphones and tablets. By using a mobile site viewer, developers can identify and address layout, design, and functionality issues specific to mobile views. This tool helps optimize user experience by ensuring that content and interactive elements are properly displayed and accessible. Mobile site viewers are essential for testing performance and making necessary adjustments before a site goes live. They play a crucial role in delivering a seamless and engaging mobile browsing experience.