J.K. Rowling's website was called Pottermore before it became Wizarding World Digital.
Pottermore launched in 2012 as an interactive website connected with the Harry Potter books. It offered reading experiences, additional writing by Rowling, quizzes, sorting-related features, and information about the wizarding world. The site was developed with Sony and became a major official online destination for fans.
In 2019, Pottermore Publishing and Warner Bros. reorganized the main online experience under the Wizarding World brand. The website itself moved toward WizardingWorld.com, while Pottermore Publishing continued as a name associated with digital editions and related publishing activity.
The names can therefore refer to different stages of the same broader digital history. Pottermore is the original and widely recognized name; Wizarding World is the later brand used for the franchise's official online presence.