Celery seeds are the small, dried seeds harvested from the celery plant, known scientifically as Apium graveolens. 

These seeds are a versatile spice and have a slightly bitter, earthy flavor with hints of celery. 

They are commonly used in cooking, pickling, and as a seasoning in various dishes. 

Celery seeds are also valued for their potential health benefits, as they contain essential nutrients and phytonutrients, including antioxidants. 

They are often used to enhance the flavor of soups, stews, dressings, and coleslaw, and they can be a valuable addition to a balanced diet.

 Additionally, some people use celery seed extracts or supplements for their potential anti-inflammatory and diuretic properties, although their health benefits may vary from person to person.