Why were potatoes brought back from America and important crops in Europe?

Potatoes were brought back from the Americas to Europe in the late 16th century, primarily due to their high yield and nutritional value. They became a staple crop, especially in regions like Ireland and Eastern Europe, as they could thrive in various soil types and climates. The introduction of potatoes significantly contributed to population growth and improved food security, helping to alleviate famines and supporting the rise of urbanization during the 18th and 19th centuries. Their impact on European agriculture and diet marked a significant shift in food systems, making them one of the key crops in the continent's history.