This tutorial demonstrates how to use Node.js and the Deepgram JavaScript SDK to transcribe live radio broadcasts and store spoken words in a file for further analysis. The process involves setting up a new Node.js project, installing necessary dependencies, creating a Deepgram Live Transcription session, fetching real-time audio data from radio stations, sending the audio data to Deepgram for transcription, and saving the returned transcripts to a file. The final code snippet is provided for reference.