Circuit analysis is the process of examining electrical circuits to understand their behavior and performance. It involves applying mathematical techniques and laws, such as Ohm's Law and Kirchhoff's Laws, to determine voltages, currents, and resistances within the circuit. This analysis helps engineers design and troubleshoot electronic devices. By breaking down complex circuits into simpler components, circuit analysis allows for easier calculations and predictions of how the circuit will function. Tools like circuit simulation software can also aid in visualizing and testing circuit designs before physical implementation, ensuring efficiency and reliability in electrical engineering projects.