User Experience (UX) plays a crucial role in ensuring the satisfaction of customers. However, it is an ongoing process that spans anticipated, momentary, and episodic time periods rather than being limited to short durations for any product or system. Due to its broad scope, various components are considered within it. Usability, being at the core, along with usefulness, desirability, accessibility, reliability, user engagement, and hedonic values, is all encompassed by UX. Meeting the requirements of these components with the appropriate factors will yield positive UX results. Moreover, understanding the importance of each factor will ensure the efficient use of time and resources. In this study, corporate sales websites are the focus, and the factors influencing user experience are first identified through a thorough literature review. Subsequently, expert opinions from a major telecommunications company in Türkiye are gathered to prioritize the relevant factors using fuzzy FUCOM, a popular robust technique in the MCDM literature. The identified main factors and their calculated relative importance weights, shown in parentheses, are: information architecture (0.1894), interaction design and process steps (0.2732), screen ergonomics (0.1792), and trust and creation (0.3582).