What important realization did Amerigo Vespucci come to during his explorations?

Amerigo Vespucci's explorations led him to the significant realization that the lands he encountered were not part of Asia, as many had believed prior to his voyages. This understanding was pivotal in distinguishing the newly discovered territories of the Americas from the known world, particularly Asia, which was the dominant view following Christopher Columbus's journey. Vespucci's detailed observations and writings illustrated that these lands had distinct geographical and cultural features, which diverged from previously established notions of the known continents. His conclusion played a crucial role in redefining maps and the understanding of world geography, ultimately leading to the recognition of the Americas as separate continents. Thus, his insights contributed to the broader European understanding of global geography during the Age of Exploration.