Traditionally, blood glucose is measured with a fingerstick method. This involves multiple sticks in a day and only gives a snapshot of blood glucose at that time. However, blood glucose might fluctuate and change in-between measurements.
Continuous glucose monitoring tracks your blood glucose at all times. You can better balance a day by monitoring the trends and adjusting medicines, diet, and activity. It has alarms that notify when glucose is dangerously high or low. It also tracks and saves the data, so you don't need to worry about noting the glucose levels or losing the information. The data can be downloaded by your physician to help in your care.