This research paper explores the significance of user experience (UX) and user interface (UI) design in the context of e-commerce and its impact on driving sales. With the exponential growth of online shopping, businesses are facing intense competition, making it crucial to differentiate themselves through superior user experiences. This study aims to identify the key elements of UX design AND UI design that can enhance the e-commerce user journey and ultimately drive sales. The research involves an introduction , methodology and finding and analysis on how user experience and user interface design has an impact on sales. This fits into the context of the field of the user experience as the end-user is central to optimizing the online experience, so gauging it will help optimize features in an application or platform. This also fits into the context of information systems as all applications and businesses, many of which are in the e-commerce and fashion spaces, utilize the technologies and concepts of information systems. This is not the first time this question has been asked as to how user experience,user interface drives e commerce sales a survey was conducted using Qualtrics, since conducting( a survey is a common method used to answer questions concerning the user experience). Subjects were asked preliminary questions, and questions addressing the five variables of user intention in buying products, usability, ease of use, findability, and desirability. Survey data was collected, and two multiple regression analyses were performed. The statistical significance of the results is determined, and then the relevance is evaluated. It was found that if an application in the mobile e-commerce fashion space is useful to the user, then it is desirable to the user. It was also found that if an app is desirable to the user, users in turn have the intention to buy products using these apps. From this research, next steps include obtaining a larger sample size to get more statistically significant data. Future research includes testing other factors of the user experience, modifying the survey to further test existing variables, and exploring different niche industries in mobile e-commerce applications to explore the user experience in other areas of e-commerce. Regarding the user interface which makes it visually pleasing , it does not only include aesthetic, many people are confused thinking that user interface is just about aesthetic which is not the case User interface ust like user experience holds a lot of importance , a lot of focus , strategies , ideas goes into making a website user friendly as well as visually accurate and pleasing , and to make that accurate and pleasing and easy to use.