The type of fat considered beneficial for heart health is unsaturated fat, particularly monounsaturated and polyunsaturated fats. These fats, found in foods like olive oil, avocados, nuts, and fatty fish, can help lower bad cholesterol levels (LDL) while increasing good cholesterol (HDL). Incorporating unsaturated fats into the diet promotes cardiovascular health and can reduce the risk of heart-related diseases. They are vital for overall health and should replace saturated fats in the diet whenever possible.