High-Density Lipoprotein, often called HDL, is a type of cholesterol found in the blood. It is known as the "good" cholesterol because it helps remove other forms of cholesterol from the bloodstream. By transporting excess cholesterol to the liver, HDL plays a crucial role in reducing the risk of heart disease and stroke. Having higher levels of HDL is generally associated with better heart health. Factors like regular exercise, a healthy diet, and not smoking can help increase HDL levels. It's important to maintain a balance of cholesterol types for overall well-being and to support cardiovascular health.