I first heard of these from Sonia Choquette. She recommended exploring cards/tools to develop intuition.  Now that I explored this extensively, I  understand why she said that.  These 40 cards have medieval art and rely on symbols. Some cards are similar to the Major Arcana but there are new ones like yes, no, now and never. The groupings are fundamentals, seven archetypes, seven symbols, seven characters and seven happenings. The cards may be used as as any card deck, either as a game, or as a serious tool for questions.
Jung placed great importance on symbols and archetypes and argued we make sense of our world through them, which is true. People use symbols for marketing to make a point, express a viewpoint or themselves. Dreams communicate powerfully though symbols. How many times has your friend said to you "well that meant to me..... for sure."? I rest my case.