Ohm's Law is a fundamental principle in electronics that relates the voltage across a conductor to the current flowing through it and the resistance of the conductor. It is represented by the formula V = I * R, where V is the voltage, I is the current, and R is the resistance. Ohm's Law is essential for designing and analyzing electrical circuits, as it allows engineers to predict how components will behave under different conditions, determine the appropriate values for components in a circuit, and troubleshoot issues related to voltage, current, and resistance. In summary, Ohm's Law is crucial for understanding and working with electrical circuits in various electronic devices.