Ghosts are souls that are trapped between dimensions....
Souls that are not ready to go to the next dimension yet...so some get trapped and either they have to accomplish one more thing before they go, or thats their punishment.
Good ghost v. Bad ghosts
Good ghost dont scare ppl, instead they are here to accomplish something good mostly for family members or friends, after they do whatever they have to do..they move to the next dimension.
Bad ghosts are the ones the scare the shit out of ppl, mostly because they were real bad ppl, (rapist,child molester etc).
so their soul is punished they not allowed to move to next dimension(neither lower than us or higher) until end of time.
