Also, legal notice: Emphasize the importance of legal purchases and not sharing CD keys.
Also, mention that the game is part of the Harry Potter series of games, but it's different from the others. The previous games were developed by other studios, but this one might have been done by EA itself or a partner. But the activation via CD key is the main focus here.
Also, some people might be looking for a free CD key, which is unethical and often a sign of a scam. It's better to advise legal purchases.
Also, the physical copy would come with a CD key on a card inside. If someone wants to play from scratch, they might purchase the physical copy from a retailer like Amazon, GameStop, or online marketplaces, but again, availability might be limited now.