Spirits, often referred to as ghosts, are believed to be the souls or essences of deceased individuals. Many cultures around the world have stories and traditions that involve these entities, which are thought to linger in the physical world due to unfinished business or strong emotional ties. The concept of spirits varies widely, with some people viewing them as benevolent protectors, while others see them as malevolent forces. Paranormal investigations often seek to find evidence of spirits through various methods, including electronic voice phenomena (EVP) and spirit photography.