Continuous glucose monitors (CGMs) are devices that track blood sugar levels in real-time. They consist of a small sensor placed under the skin, which measures glucose levels in the interstitial fluid. This data is sent to a display device, allowing users to see their glucose trends throughout the day. CGMs are particularly useful for individuals with diabetes, as they help manage blood sugar levels more effectively. By providing alerts for high or low glucose levels, CGMs can assist users in making timely decisions about their diet, exercise, and medication, ultimately improving their overall health.