Don't enter confidential information in your conversations with Gemini. Conversations are reviewed by human annotators and used to improve our products. Please don't share information you wouldn't want a person to see or used to improve our products.
This warning, buried within the privacy policy, signals that Gemini is not a secure or confidential communication channel — a fact that many users who share medical, financial, or professional information may not realize.
Every conversation you have with Google Gemini is stored by Google for up to 18 months by default and may be read by human reviewers for safety and quality purposes, meaning sensitive personal information shared in chats could be accessed by Google employees. Your Gemini conversation data may also be used to train and improve Google's AI models unless you opt out, creating a persistent data footprint that extends well beyond the immediate session. You can turn off Gemini Apps Activity at myactivity.google.com to stop future conversations from being saved, and you can delete past conversations from your Gemini activity history on that same page.