What should I never share with an AI chatbot for safety reasons?

Never share passwords, financial account numbers, your home address, or sensitive company data with an AI chatbot — these conversations can be reviewed by humans and may be used for training. Most people don't realize that when you chat with free AI tools, your inputs aren't private. OpenAI, for instance, states that conversations may be reviewed by human trainers to improve the system. Google's Gemini has similar policies. I know it feels like a private conversation. It's not. A concrete example: in 2023, Samsung employees accidentally leaked confidential source code and meeting notes by pasting them into ChatGPT to debug or summarize them. The company had to ban internal AI use for months. Even if you're just asking for help drafting an email, be careful. Don't paste in a full client contract and ask for edits. Don't share your social security number to format it. Don't upload a spreadsheet with employee salaries. A safer workflow: strip out identifying details before you paste anything in. Use placeholders like [Company Name] or [Client Address]. Some paid tools offer enterprise-grade privacy, but free tiers almost never do. Treat AI chat like a public library computer — useful, but not the place for secrets. **Related**: Does ChatGPT save my conversations? | How do I use AI without leaking company data?