An appetizer, also known as an hors d'oeuvre or starter, is a small portion of food served before a meal to whet one's appetite. It usually consists of a variety of flavors and textures to stimulate the taste buds and prepare the palate for the main course. Appetizers can be hot or cold, savory or sweet, and may include anything from crackers with cheese to soups, salads, or small sandwiches. They are often designed to showcase a particular ingredient or flavor profile, and provide an opportunity for creative culinary expression.