Signal Integrity refers to the quality and reliability of electrical signals as they travel through a circuit. It ensures that the signals maintain their intended shape and timing, which is crucial for proper communication between electronic components. Poor signal integrity can lead to errors, data loss, or system failures. Factors affecting signal integrity include crosstalk, reflection, and attenuation. Crosstalk occurs when signals from adjacent wires interfere with each other, while reflection happens when signals bounce back due to impedance mismatches. Attenuation refers to the loss of signal strength over distance. Maintaining good signal integrity is essential for high-performance electronic systems.