Jacques Cartier was a French explorer who is best known for his exploration of the St. Lawrence River and his role in the early European exploration and colonization of Canada. He made three voyages to Canada between 1534 and 1542, during which he claimed the land for France and made contact with the indigenous people. Cartier's explorations laid the groundwork for French claims to Canada and the establishment of New France. His expeditions also contributed to the knowledge of North America and the opening of the continent to further exploration and colonization by European powers.