Colonies affected ancient Greek culture by spreading their culture over a wide area. Greek city-states began looking for more land and resources in the first half of the first millennium BCE. They started to establish colonies across the Mediterranean. Since trade proved to be an important way of living to ancient Greek, they used to be the beginning of their colonization.
According to sources, ancient Greek was able to establish more or less 500 colonies reaching to Italy, North Africa, Spain and France, to name a few. Through colonization, not only they were able to spread their own culture to different territories and it made trading more prosperous, they were also able to obtain other valuable traits from their colonies such as science, mathematics, philosophy, art and pottery design, to name a few.