A Digital Multimeter (DMM) is an electronic device used to measure various electrical properties, including voltage, current, and resistance. It displays readings on a digital screen, making it easier to read than traditional analog meters. DMMs are essential tools for electricians, engineers, and hobbyists working with electrical circuits. Most digital multimeters come with multiple functions, allowing users to switch between measuring direct current (DC), alternating current (AC), and resistance. Some advanced models also include features like temperature measurement and continuity testing. Overall, a DMM is a versatile instrument that simplifies electrical diagnostics and troubleshooting.