An operational amplifier, often abbreviated as op-amp, is an electronic component used to amplify voltage signals. It has two input terminals, called the inverting and non-inverting inputs, and one output terminal. Op-amps are widely used in various applications, including signal processing, filtering, and mathematical operations like addition and subtraction. Op-amps can be configured in different ways to perform specific functions, such as voltage followers, integrators, and differentiators. They are characterized by high input impedance and low output impedance, making them ideal for interfacing with other electronic components. Their versatility and efficiency make them essential in modern electronics.