User behavior significantly influences website design and functionality, as insights into user preferences shape the overall experience. Understanding how users interact with a site, their pathways, and their engagement levels informs design choices, such as layout, navigation, and content placement. Analytics tools track user actions to identify pain points and opportunities for optimization, ultimately enhancing usability. Responsive design and accessibility considerations are also critical in meeting varied user needs. By aligning design with user behavior, businesses can foster engagement, drive conversions, and improve overall satisfaction.