Religion was a way for Egyptians to explain their surroundings, such as the annual Nile flooding. Daily happenings such as the sun setting and rising, were also explained through religion. Deities were modeled after humans, as in they lived and died, and needed sustenance to survive.
Osiris was the god that made a peaceful afterlife possible. The Egyptian "Book of the Dead" contains the major ideas and beliefs in the ancient Egyptian religion. Because their religion stressed an afterlife, Egyptians devoted a lot time and wealth to preparing for survival in the next world.
We have things such as maps, scientific and math ideas, columns and pillars, an alphabet and a calendar that we all use to this day. Even our legal system is based on what Rome had been doing