Low-density lipoprotein (LDL) is the “bad,” unhealthy kind of cholesterol. LDL cholesterol can build up in your arteries and form fatty, waxy deposits called plaques.

High-density lipoprotein (HDL) is the “good,” healthy kind of cholesterol. It transports excess cholesterol out of your arteries to your liver, which removes it from your body.

Cholesterol is needed by the following in the body
•Endocrine system

Your body’s hormone-producing glands use cholesterol to make hormones such as estrogen, testosterone, and cortisol. Hormones can also have an effect on your body’s cholesterol levels

•Nervous system

Cholesterol is an essential component of the human brain. In fact, the brain contains about 20 percent of the body’s entire supply of cholesterol. This fat is essential for the development and protection of nerve cells, which enable the brain to communicate with the rest of the body. Too much of it is dangerous

•Digestive system

In the digestive system, cholesterol is essential for the production of bile — a substance that helps your body break down foods and absorb nutrients in your intestines. But if you have too much cholesterol in your bile, the excess forms into crystals, and then hard stones in your gallbladder. Gallstones can be very painful.

•Cardiovascular and circulatory systems

When you have too much LDL cholesterol in your body it can build up in your arteries, clogging them and making them less flexible. Hardening of the arteries is called atherosclerosis. Blood doesn’t flow as well through stiff arteries, so your heart has to work harder to push blood through them. As plaque builds up in your arteries, over time you can develop heart disease.

Conclusion
Cholesterol in the overall view isn’t bad in fact it is required essentially by some parts of the body . But too much of LDL isn’t good in the body