Continuous Glucose Monitoring (CGM) is a system used to track blood glucose (sugar) levels continuously throughout the day and night. It is primarily used by individuals with diabetes to help manage their condition. CGM provides real-time data on glucose fluctuations, allowing users to adjust insulin, food, and activity to maintain better blood sugar control and prevent dangerous spikes or drops in glucose levels. The system includes a sensor, transmitter, and display device, offering insights into glucose trends and alerts for high or low levels, which improves overall diabetes management.