

In essence it goes like this: With any communication there is a rebound - an echo - a response. Something comes back. Or nothing comes back. In either case, there is a feedback loop. If nothing comes back - then the feedback loop tells you that you bombed. Stony silence. Your joke fell flatter than a squashed armadillo on a Texas highway. You still have feedback, though. You learn from it.
Many disciplines talk about the feedback loop. You hear of it in economics, medicine, psychology, electronics, teaching (especially teaching) and many others. It is applied to about everything - it just makes sense. Take a look at Google's image search results of charts from various disciplines which reference it. The images alone give you the idea.
Important is the concept that the communicator must be a listener as well as a speaker. The feedback allows you to modulate your message so that it is properly received. Without feedback you cannot do this.
The feedback loop on the Internet is fantastic. Not only is there the option for open feedback, in the form of comments, posting of your communications on other blogs or in other stories, email to you, and so forth; but there is hidden feedback in the form of metrics which tell you how many people are reading you, how long they stay on your site and where they came from. It is an amazing advantage to the modern communicator that very few journalists use.
When it comes to multimedia, it is even more powerful. When my message is communicated with various forms of storytelling - video - blogging - transcripts of interviews - whatever - I can look and see what people are paying attention to. If I listen and learn, then I can improve my storytelling art and become a much more listened-to journalist.