Coaxial cables are feeders of electrical signals (or energy) used to transmit video, data, and radio frequencies. Familiar cables are ubiquitous and can be found in both residential and commercial settings. Not only do they transmit signals from one location to another, but they also connect the source to the load application. Think about it: connect the transmitter to the antenna.
More common uses and applications for coaxial cables are connecting radio transmitters and receivers to antennas, Internet connections and computer network connections (such as Ethernet), connecting digital audio signals, and distributing cable television signals.