An appetizer is a small dish served before the main course of a meal. Its purpose is to stimulate the appetite and provide a preview of the flavors to come. Appetizers can vary widely in style and ingredients, ranging from simple items like bruschetta or cheese platters to more elaborate preparations like stuffed mushrooms or shrimp cocktails. Appetizers are often enjoyed at social gatherings, such as parties or formal dinners, and can be served hot or cold. They can be presented in various forms, including finger foods, dips, or small portions of more complex dishes, making them a versatile addition to any dining experience.