The piece offers a practical method for using ChatGPT to edit writing. The author suggests adding specific instructions to prompts that instruct the AI to bold any additions and strike through deletions. This way, users can clearly see changes made, similar to traditional copy editing. The method works well in ChatGPT and Microsoft Copilot but has limitations with Gemini and Claude, which don't consistently use the strikethrough formatting. The author finds Gemini underwhelming compared to paid tools, noting that it often struggles to answer questions effectively. There’s a strong emphasis on sharing prompts in comments for easier mobile access. Several users express appreciation for the tip, highlighting its usefulness in improving content review processes. Some mention using Google Docs for manual tracking of changes, while others find Gemini useful for organizing thoughts rather than content creation. The overall sentiment is positive, with users eager to implement the suggestion for better editing clarity.