The deck is built in Anki (the flashcard platform used by med school students, language learners, and students everywhere). You can access the flashcards on your phone or desktop. No more lugging around piles of index cards.
And Anki offers spaced repetition -- a fancy way of saying cards you already know, you see less often. Cards you're still learning, you see more often. This way you focus on what you need to learn and keep it in your long term memory.
The cards are yours to personalize. Edit them. Add more cards. Delete cards. Your deck is your own and won't effect anyone else's.