The COVID-19 pandemic has led to a significant increase in online shopping, with mobile devices becoming the primary mode of online shopping. Mobile e-commerce accounts for 73% of e-commerce sales and is expected to continue growing. Developing a mobile app for an e-commerce website can lead to increased revenues and improve user experience. To create a seamless mobile e-commerce journey, businesses need to focus on product presentation, navigation, image optimization, core web vitals, one-tap payment methods, and testing for mobile views. Investing in mobile-first design UX is crucial for improving sales, with benefits including faster loading times, reduced redirects, and enhanced user experience. By prioritizing mobile UX, e-commerce websites can increase conversions, improve customer satisfaction, and stay competitive in the highly competitive online shopping landscape.