Right, it's called marketing. And it tries to describe what the authors were aiming for. F.ex. //it helps you when you need it, and stays out of your way when

Right, it's called marketing. And it tries to describe what the authors were aiming for. F.ex. //it helps you when you need it, and stays out of your way when you don’t// I read as "We don't use UI chrome that's distracting, only showing those things that you need contextually".