The spread of ideas, customs, and technologies from one people to another?

The spread of ideas, customs, and technologies from one people to another is called cultural exchange.

Explanation:

Cultural exchange has been happening for almost as long as there are cultures along the world.

Cultures only happen due to amalgamations of different ideas of lifestyle and how people must live their lives.

These ideas are shared between communities in terms of customs that they follow and technologies that they are using, along with their art, craft products and religions.

They are adopted and changed by the people taking up the same from them and so is culture spread.