Pottermore was the name of J.K. Rowling’s 2011 digital platform for the Harry Potter universe.
Launched in 2011, Pottermore combined interactive features with original writing by Rowling, including background information about characters, places, customs, and wizarding history. It also offered digital editions and audiobooks of the Harry Potter novels through associated commercial arrangements.
The platform was later redesigned and rebranded as WizardingWorld.com, which became the main online home for official Wizarding World content. That change explains why newer readers may recognize Wizarding World rather than Pottermore.
Pottermore is not the name of a newspaper, school, or location within the fictional universe. The word refers to the website and brand created to deliver interactive and supplementary Harry Potter material to fans.