What is the pendulum in tarot cards? What's the role?

Tarot cards and pendulums are both tools of divination. Tarot cards belong to the category of cards, so I'll give you some advice. The pendulum is conical, of course, there are many shapes. It is applicable to the question of "whether" divination. Tarot cards and pendulums are two divination tools, and pendulums do not belong to Tarot cards. Of course, you can use them together in divination, but it is not recommended to ask the same question many times.