Signal degradation refers to the loss of quality in a signal as it travels through a medium, such as air or cables. This can occur due to various factors, including distance, interference, and obstacles. As the signal weakens, it may become distorted or harder to interpret, leading to reduced performance in communication systems. Common examples of signal degradation include issues in telecommunications and broadcasting. For instance, a cell phone call may become unclear if the signal is weak, or a Wi-Fi connection may drop if there are too many walls between the router and the device.