What is the primary purpose of using bitters in cocktails?

Bitters are an essential ingredient in many classic cocktails because they add aromatic complexity, enhancing the overall flavor profile of the drink. They are concentrated flavor extracts typically derived from herbs, spices, and botanicals, which contribute depth, balance, and a layer of complexity that can elevate the drinking experience.

When used appropriately, bitters can help to round out the flavors in a cocktail, creating a harmonious blend rather than allowing any single component to dominate. This complexity often brings out the nuances of other ingredients, showcasing the bartender’s skill in crafting well-rounded and enjoyable drinks. This characteristic makes bitters invaluable in mixology, as they help balance sweetness, acidity, and bitterness in a cocktail.

While other options might seem plausible, they do not align with the primary role of bitters in cocktails, which is fundamentally about enhancing flavor rather than altering the drink's alcohol content, sweetness, or visual appearance.