An oscilloscope is an electronic instrument used to visualize and analyze the waveform of electrical signals. It displays voltage changes over time on a screen, allowing users to see the shape, frequency, and amplitude of the signals. This makes it a valuable tool in various fields, including electronics, engineering, and telecommunications. Oscilloscopes can capture and display complex waveforms, helping engineers troubleshoot circuits and design new devices. They come in different types, such as analog and digital, each with unique features. By providing a real-time view of electrical signals, oscilloscopes play a crucial role in understanding and improving electronic systems.