Ghosting typically involves manipulating the game client to appear invisible, invulnerable, or to bypass collision detection (walking through walls). This is often done in Player vs. Player (PvP) scenarios or to skip dungeons.
Running Ghost on private servers gives maximum control and potential privacy/compliance advantages, but requires significant operational investment in security, backups, and monitoring. For organizations needing custom integrations, data residency, or cost control at scale, private hosting is viable when following the practices above; others may prefer managed hosting to reduce operational burden. ghost x private server