Drupal is an extremely flexible system. To achieve this, various layers of abstractions are built into it. Many concepts were create to explain these abstractions. Unfortunately, they are not always intuitive for someone just starting with drupal. For example, the ubiquitous word 'node' does not represent a point in a network nor a server side programming language.
A new version of drupal is soon to be released. It will ship with lots of cool new features and, as you might imagine, it will bring new concepts and more questions for beginners.
The drupal community don't want new adopters and prospect contributors go away for not understanding our parlance. Come to this session and figure out what is drupal. Don't worry, it won't be a theoretical, boring talk. It will be a joyful conversation with lots of examples to help you understand drupal and why it is so powerful.