What were the reasons for the settlement of the Vikings?

The main reasons why the Vikings began to actively seek new lands and move there in the Middle Ages are the overpopulation of their historical homeland (Denmark, Scandinavia, the Baltic States) and the small area of fertile land in this region. The homeland of the Vikings is known to be in the northernmost and coldest parts of Europe, where winter is the longest season of the year. In such conditions, they did not receive a sufficient harvest and were forced to look for more fertile lands. Most of the Vikings moved to Iceland, Britain, France, etc.