Mobile Performance Optimisation for E-Commerce Mobile performance optimisation for e-commerce focuses on improving the speed, usability, and stability of online stores on smartphones and tablets to enhance shopping experiences and increase conversions. Since a large percentage of online purchases now come from mobile devices, optimising mobile performance is essential for both user satisfaction and search visibility. Key techniques include compressing and properly sizing images, minimising JavaScript and CSS files, enabling browser caching, and using content delivery networks (CDNs) to reduce loading times. Responsive design, touch-friendly navigation, and simplified checkout processes further improve usability for mobile shoppers. Enhancing Core Web Vitals metrics such as Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS) ensures pages load quickly, respond smoothly, and remain visually stable. By combining technical optimisation with mobile-first design, mobile performance optimisation helps e-commerce businesses reduce bounce rates, improve engagement, and drive higher mobile sales.