What is the cows purpose on the farm?

Answer 1

The magnificent creature, the cow is known for produces it's manure. Manure can be used for growing plants, or grounded up into mulch or wood-chips. They also are used for dairy products. Such as milk, cheese, yogurt. In some farming experiences, cows are used for meat. Their thick meat is used for a variety of meals.

Answer 2

A cow is there to produce offspring to rear for the next generation of cows (since cows don't live forever), produce milk (if their dairy), and keep the grass down in the corrals and pastures.

Answer 3

Eat grass and produce milk and manure. She'll also produce calves that will be slaughtered for meat when they're big and old enough.