Synchronous circuits are electronic circuits that operate based on a clock signal. This clock signal coordinates the timing of all operations within the circuit, ensuring that data is processed in a predictable manner. Each component in the circuit, such as flip-flops and registers, changes its state only at specific moments defined by the clock, which helps maintain data integrity. These circuits are commonly used in digital systems, including computers, microcontrollers, and communication devices. The predictable timing allows for easier design and debugging, making synchronous circuits a popular choice in modern electronics.