A sauce is a liquid or semi-liquid substance served with food to enhance its flavor, moisture, or texture. It can be savory or sweet, and it often serves as a complement to the dish it accompanies. Sauces are typically made from a combination of ingredients like stocks, broths, dairy, vegetables, herbs, spices, and oils. They can vary in consistency from thin and runny to thick and creamy, and are often used to add depth and complexity to a meal.