What is cultural diffusion? How did it play a role in Ancient Civilizations?

How does it play a role today?

it is the spread of cultural beliefs and social activities from one group of people to another. Through cultural diffusion, horizons are broadened and people become more culturally rich.

Explanation: technology is a cultural diffusion. Everyone with internet access is now capable of an entire world of information. Everyone can be talked to from any difference, this is a good cultural diffusion