Circuit components are the basic building blocks of electrical circuits. They include items like resistors, capacitors, inductors, and diodes. Each component has a specific function, such as controlling the flow of electricity, storing energy, or allowing current to flow in one direction only. These components can be combined in various ways to create complex circuits that power devices like computers, smartphones, and home appliances. Understanding how these components work together is essential for designing and troubleshooting electronic systems.