Ghost means the disembodied soul or spirit of a deceased person. spirit appearing after death.

Everybody is not privileged to see a ghost at the same time, ghost distance themselves from the locations where people recognise them, some stubborn ones do appear to the people that caused their death, or their love ones in a specific situation. If you eventually have an encounter with a ghost of a known person, and the ghost is aware that you have seen him, it will quickly disappear, no matter how you look around you cannot see him/her there again.

In the case of a ghost that goes around, the easy way to identify it is that, his face will not be stable, no steady .. cont'
https://www.bazecity.com/scary-see-how-best-to-identify-a-ghost/