A pendulum is a dowsing, divination, tool commonly used in spiritual practices. It can be used to assist with yes or no questions, assessing and balancing chakras, spiritual communication, spiritual cleansing, and more. As with all divination tools, it's important to remember to ground and protect yourself and your space. I also remind you to take it with a grain of salt. You have all the answers you seek within so please don't make huge life decisions based on which way your pendulum spins. It's a tool, not a toy and it's crucial to do further research before diving into this practice or one's similar.