Cattle provided a surplus of meat to the conquistadors and other Europeans. The Europeans benefited from the cattle in many ways.
Cattle who can spread diseases such as, cryptosporidiosis, E.Coli, ringworm, and salmonellosis. As the Europeans had developed immunity to many of these diseases, they were able to survive while the Native Americans and other settlers died from these diseases. This definitely helped the Europeans conquer the Americas.
Cattle were a highly important resource for the Europeans as they conquered North America. Even today, cattle are important in the North American lifestyle. There are 98.4 million cattle and 60,000 dairy farms in the United States.