What is VTX telemetry and why should you care? (SmartAudio and Tramp)

Since the release of FPV systems, the drone industry has tackled issues such as interference or accessibility. In order to combat these problems, we seem to be forever coming up with new and improved ways to deal with them. An interesting new feature you will start to see more of

This is a companion discussion topic for the original entry at http://blog.dronetrest.com/smart-audio-vtx/