A blood glucose meter is a small, portable device used to measure the level of glucose in a person's blood. It is commonly used by individuals with diabetes to monitor their blood sugar levels, helping them manage their condition effectively. The meter works by using a small drop of blood, usually obtained from a fingertip, which is placed on a test strip inserted into the device. The meter displays the blood glucose level on a digital screen, providing immediate results. Regular monitoring can help users make informed decisions about their diet, exercise, and medication, ultimately contributing to better health and well-being.