The Montrose Magpies Quidditch Badge is a collectable object .
|“||Show your support for the most successful team in the history of the British and Irish League.||”|
At the end of the third Pottermore House Cup, it was announced that the winning house would gain early access to the Montrose Magpies Quidditch badge, and other houses would be able to collect it in the final installment of Prisoner of Azkaban.
The Quidditch badge currently has no use on Pottermore.
To create this object, Pottermore editors used one of the very first Ravenclaw crest sketches. It's the one in the middle of the picture.