Prompt for ChatGPT Custom Instructions (Free Copy-Paste Prompt)

Copy-ready prompt

Help me write ChatGPT custom instructions.
About me: [role, what I do, what I use ChatGPT for].
How I want responses: [tone, length, format preferences, expertise level].
Produce two sections:
1. 'What ChatGPT should know about me' (concise).
2. 'How ChatGPT should respond' (specific rules).
Keep each within a short paragraph and make the rules concrete.

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Why this prompt works

Custom instructions save you from repeating preferences every chat. This prompt distills who you are and how you want answers into the two-box format ChatGPT uses, so every future response is tuned to you by default.

How to customize it

Be concrete about format and length preferences.
Mention your expertise level so answers aren't over- or under-explained.
Update them as your needs change.

Tip: replace the parts in [square brackets] with your own details before you send. The more specific you are — audience, tone, goal, constraints — the better the AI output.