An Ouija Board is a flat board marked with letters, numbers, and other symbols, used in a séance to communicate with spirits. Participants place their fingers on a small pointer called a planchette, which is believed to move in response to questions asked, spelling out messages from the beyond. The board gained popularity in the late 19th century as a parlor game and has since been associated with the spiritualism movement. While many view it as a fun activity, others believe it can invite unwanted spirits or energies, leading to various opinions about its use and safety.