Celery is a crunchy and refreshing vegetable that is commonly used in soups, stews, salads, and as a snack. It has a mild, slightly sweet flavor and is high in fiber and nutrients like vitamins A, C, and K. When selecting celery, look for firm stalks with fresh leaves that are free from discoloration or damage. Store celery in the refrigerator for up to a week, and wash it before use to remove any dirt or debris. To prepare celery, trim off the base and remove any damaged or discolored parts. Cut the stalks into desired lengths or chop them finely for use in soups and salads.