The United States Department of Agriculture (USDA) is tasked with guaranteeing the quality of American food. The American Marketing Service (AMS) is a division of USDA that provides for grading, certification and verification of food products. This series will define the labeling we see on our food and share simple recipes to make with quality products. U.S. Grade Standards for Dairy are voluntary and aid in the marketing of milk and dairy products by providing a common language of trade through the development, improvement, and interpretation of standards, specifications and quality improvement programs.