What lands did the ancient Greeks settle on? what is the great Greek colonization?

Because the ancient Greeks were mainly engaged in coastal voyages, they founded their colonies near the metropolis, that is, where they could sail along the coast. Therefore, the shores of the Black Sea became the basis of this process. Great Greek colonization is understood as the process of resettlement of a significant number of Greeks to the Black Sea coast and the establishment of colonies there in the 7th century BC. This process is associated with the fact that in ancient Greece, in the Balkans, there was a significant shortage of land, which forced many people to leave their native lands.