Pickling is a food preservation method where food is preserved in brine or vinegar to prevent spoilage. It began 4000 years ago using native Indian cucumbers. The term "pickle" comes from the Dutch word for brine. There are different types of pickles including brined dill pickles, fresh pack, relishes, and fruit pickles. Key ingredients in pickling include salt, vinegar, sugar, and spices which help preserve foods and add flavor. Proper selection, washing, measuring of ingredients, and use of appropriate equipment are tips for successful pickling.