Medium chain triglycerides are essentially fats, but the good kind! They are medium because they have 6-12 carbon atoms and that allows them to go straight to the liver.
MCTs can provide an instant energy source because the shorter chains allow it to be rapidly broken down and converted to energy. It goes straight to the liver and skips the lymphatic system and can release energy like a carbohydrate. When fat is broken down, ketones are created. Ketones are released into the bloodstream and taken up by mitochondria to use for energy.
Also another major benefit is that it can help with weight loss. MCTs increase fullness and is less likely to be stored as fat so it's great for low carbohydrate diets.