Meters are essential electronic measuring instruments used to monitor, measure, and display electrical parameters in circuits and systems. They are commonly used to measure voltage, current, resistance, power, frequency, and other related quantities, helping in testing, troubleshooting, and system monitoring. Meters can be analog or digital and are designed to provide accurate and reliable readings under various operating conditions. Available in different types such as voltmeters, ammeters, ohmmeters, multimeters, and power meters, they come with varying measurement ranges, accuracy levels, and display options. Meters are widely used in consumer electronics servicing, industrial maintenance, automotive diagnostics, laboratories, and educational environments, contributing to safe operation, precise measurement, and improved system performance.