Fortune-telling decks are a type of divination tool that have been used for centuries. The most popular type of fortune-telling deck is the Tarot, which consists of 78 cards divided into two sections: the Major Arcana and the Minor Arcana. The Major Arcana consists of 22 cards that represent major life events, while the Minor Arcana consists of 56 cards that represent everyday life events. Tarot cards can be used to gain insight into the past, present, and future, as well as to gain insight into one's own life.