He starts by briefly talking about HAML, a markup language that aims to make it easier and cleaner to write well-formatted HTML documents. Jade creates the entire document this way, meaning you could use it even without any templating needs (just outputting normal HTML pages). He shows you how to get started with the code and provides a simple example of a basic HTML page without any template objects to replace.He explains the markup and what each part does before moving on and showing how to add in the dynamic content and logic. He finishes off the tutorial by answering the question "Why use Jade?" touching on some of the good and bad of the templating engine.