Okay kiddo, so in Polynesian culture, people believe in ghosts. These ghosts are called "tupua" and they are believed to be spirits of ancestors who have passed away.
The Polynesians believe that tupua can come back to visit the living and give them advice or warnings. Tupua can also be protective and help their loved ones in times of need.
But not all ghosts are friendly. There are also "vaitafe" which are evil spirits. These spirits can cause harm to people and possess their bodies.
To protect themselves from vaitafe, the Polynesians use charms and rituals to keep themselves safe. They also believe that certain kinds of foods and activities can attract or repel tupua and vaitafe.
So, while ghosts in Polynesian culture can be helpful and protective, they can also be scary and dangerous. But people use their beliefs to keep themselves safe and connect with their ancestors who have passed away.