Card sorting in website UX (user experience) is a method used to organize and categorize information on a website by allowing users to group and label content into meaningful categories. This process helps designers and developers understand how users think and navigate through a website, allowing them to create a more intuitive and user-friendly layout. By using physical or digital cards, users can easily rearrange and group information in a way that makes sense to them, providing valuable insights for website design and organization. Card sorting is a valuable tool in the UX design process, helping to improve the overall user experience and increase user satisfaction.