Blood glucose monitoring is the process of measuring the concentration of glucose (sugar) in the blood. It is essential for managing diabetes and involves using a glucometer or a continuous glucose monitor (CGM). A glucometer typically requires a small drop of blood, obtained via a finger prick, to provide real-time glucose readings. CGMs use a sensor placed under the skin to continuously track glucose levels and provide updates to a connected device. Regular monitoring helps individuals maintain blood sugar levels within a target range, preventing complications and optimizing health.