A function generator is an electronic instrument designed to produce electrical voltage waveforms of various shapes and characteristics. It enables users to precisely control and adjust key properties of these waveforms, including their type (such as sine, square, triangle, and more), frequency (how fast the waveform repeats), amplitude (the peak voltage level), and offset (the shift from the zero voltage level). This versatility makes function generators essential tools in testing, designing, and troubleshooting electronic circuits, allowing engineers, technicians and researchers to simulate conditions that a circuit might encounter in real-world applications.