Why do ghosts appear in shakespears tragedies?

In Shakespeare's tragedies, ghosts often symbolize unresolved guilt, moral conflict, or the consequences of past actions. They serve as a catalyst for the protagonist's internal struggle, prompting reflection on themes of fate, justice, and mortality. The appearance of ghosts heightens the emotional intensity of the narrative, revealing the characters' inner turmoil and foreshadowing impending doom. Ultimately, they enhance the supernatural elements of the plays, emphasizing the tension between the natural and the supernatural.