The Egyptians were among the first to focus on an afterlife. To get there, a dead person needed his or her body. If it was preserved well, the spirit would reenter it. Then it would bring the body back to life in the next world.
To help the spirit find its body, the Egyptians made the body into a mummy. This process took a lot of time and money. Usually only pharaohs and rich or fancy people became mummies. But even those who couldn’t afford to be made into mummies hoped to go to the afterlife. They thought it was a lot like Egypt, except that the dead lived there forever.