It brings sour flavor. Basic flavors are Salty, Sweet, Sour, Bitter and Umame. Some ingredients that can give you those are (respectively) Salt, Sugar, Citric Acid, Cumin, MSG. I like to consider spicy a flavor too, but it's not, it's a touch sensation. foods that fire all cylinders in the tongue have more flavor sensation. Trick is getting the right balance of all five flavors when making the target flavor you are trying to achieve. Not all flavors should be equal strength in all dishes. Some are used a little to give it that extra something .
