Electronic signals are representations of data that can be transmitted through various mediums, such as wires or air. They can take the form of voltage changes, current variations, or electromagnetic waves. These signals are essential for communication in devices like smartphones, computers, and televisions, allowing them to send and receive information. There are two main types of electronic signals: analog and digital. Analog signals vary continuously and can represent a range of values, while digital signals use discrete values, typically represented as binary code (0s and 1s). Both types play crucial roles in modern technology, enabling everything from radio broadcasts to internet connectivity.