The Food Guide Pyramid is a guide that helps people choose a healthy diet. It shows the recommended number of daily servings from each of the major food groups: grains, vegetables, fruits, dairy, and proteins. The pyramid shape is used because it illustrates that grains should make up the largest part of one's diet, with vegetables and fruits in the next layers and dairy and proteins at the top. Following the Food Guide Pyramid recommendations helps ensure a balanced diet that provides all necessary nutrients and reduces risk of health issues like heart disease and diabetes.