A voltage meter, also known as a voltmeter, is an instrument used to measure the electrical potential difference between two points in an electrical circuit. It helps determine how much voltage is present, which is essential for diagnosing electrical issues and ensuring devices operate correctly. Voltage meters can be analog or digital, with digital versions often providing more precise readings. To use a voltage meter, you connect its probes to the points where you want to measure voltage. The meter then displays the voltage level, usually in volts (V). Understanding voltage readings is crucial for anyone working with electrical systems, from electricians to hobbyists.