Why did the spanish explore the new world in the 1500's

The spanish were looking for gold,silver, and precious spices.

Beginning with the 1492 arrival of Christopher Columbus and continuing for over three centuries, the Spanish Empire would expand across the Caribbean Islands, half of South America, most of Central America and much of North America (including present day Mexico, Florida and the Southwestern and Pacific Coastal regions ... 

You don’t have to names or other options up here so idk dude