Herb in Pickles is a term used to describe the herb DILL, which is commonly used as a flavoring in pickles. DILL is an annual herb in the celery family that has been used for centuries in cooking and medicine. Its leaves are used to flavor soups, salads, and sauces, while its seeds are used to season fish, meats, and vegetables. DILL is also used to make pickles, as its flavor complements the vinegar and spices used in the pickling process.