What are bitters good for and how can they enhance the flavor of cocktails?

Bitters are concentrated flavorings made from herbs, spices, and fruits that add complexity and depth to cocktails. They are good for balancing sweetness, adding depth, and enhancing the overall flavor profile of a drink. By adding just a few drops of bitters to a cocktail, they can help bring out the flavors of other ingredients, create a more well-rounded taste, and provide a unique and aromatic finish.