LDL cholesterol, or low-density lipoprotein cholesterol, is a type of fat found in the blood. It is often referred to as "bad" cholesterol because high levels can lead to the buildup of plaque in the arteries, increasing the risk of heart disease and stroke. Maintaining healthy levels of LDL cholesterol is important for overall cardiovascular health. Factors such as diet, exercise, and genetics can influence these levels. Regular check-ups and blood tests can help monitor cholesterol levels and guide lifestyle changes if necessary.