Clarified butter has a higher smoke point (485 °F or 252 °C) than regular butter (325-375 °F or 163-190 °C), and is therefore preferred in some cooking applications, such as sautéing. Clarified butter also has a much longer shelf life than fresh butter. It has negligible amounts of lactose and casein and is, therefore, acceptable to most who have a lactose intolerance or milk allergy.
I thought fat was flavour, but you do get a higher smoke point