Artificial sweeteners are sugar substitutes that provide a sweet taste without the calories associated with regular sugar. They are often used in food and beverages to help reduce sugar intake and manage weight. Common types include aspartame, sucralose, and saccharin, each with different properties and sweetness levels. These sweeteners are many times sweeter than sugar, meaning only a small amount is needed to achieve the desired sweetness. While they are generally considered safe for most people, some individuals may experience sensitivity or prefer to avoid them due to personal health concerns or taste preferences.