In terms of discussing AngularJS, there is the client-side front-end and back-end view and the server-side view. We address talking to a backend later in the series, stay tuned.
I still don't get the data binding in your example though. What is it binding to?
Thanks for the question. I'll update the article to explain that more indepth later today. It's 'binding' the value to the model of that DOM element in the view.
We go in-depth into the model component on the next article.