Iterative prompt development

In this lesson, the iterative prompts have repeated instructions for the prompt iterations eg “Your task is to help a marketing team create a
description for a retail website of a product based
on a technical fact sheet”. Is this necessary or does ChatGPT has the ability to extend upon the previous solutions?

Chatgpt may be able to give a useful output without some context being given previously but to increase its efficiency and correctness its better to give it some context (be it even iteratively).