Red or sweet vermouth adds a special touch to cocktails with its mix of herbs, spices, and sweetness. Each type brings its own unique flavors, making every sip interesting. It helps balance the strong taste of spirits and the bitterness of other ingredients, rounding out the drink. The sweet vermouth's aromas enhance the cocktail's smell, making it more inviting, while its smoothness makes the drink feel nicer to drink. Plus, its rich color makes the cocktail look more appealing. In classic drinks like Negronis or Manhattans, red or sweet vermouth is key to blending all the flavors together perfectly, creating a delicious, well-balanced cocktail.