The term "120 mmHg" refers to a measurement of blood pressure, specifically the systolic pressure. Blood pressure is expressed in millimeters of mercury (mmHg) and is recorded as two numbers. The first number, in this case, 120, indicates the pressure in the arteries when the heart beats and pumps blood. A reading of 120 mmHg is often considered normal and healthy for adults. It is part of the standard classification for blood pressure, where values below 120/80 mmHg are categorized as normal. Maintaining a healthy blood pressure is important for overall cardiovascular health and can help prevent conditions like hypertension and heart disease.