ChatGPT Custom Instructions That Change Everything
90% of ChatGPT users do not use Custom Instructions. That means 90% of people are getting generic answers when they could get personalized ones. Custom Instructions is the single highest-impact, lowest-effort setting in ChatGPT — and almost nobody uses it.
What Are Custom Instructions?
Custom Instructions tell ChatGPT who you are and how you want it to respond — before every conversation. It is like giving the AI a permanent memory of your preferences. Instead of explaining your background every time you start a new chat, ChatGPT already knows.
This is not the same as the newer "Memory" feature. Custom Instructions are static — you set them once and they apply to every conversation. Memory is dynamic — ChatGPT remembers things from your conversations automatically. Use both for maximum personalization.
How to Set Them Up
- Go to ChatGPT → Click your name (bottom left) → Custom Instructions
- Fill in "What would you like ChatGPT to know about you to provide better responses?"
- Fill in "How would you like ChatGPT to respond?"
- Click Save. Done. It applies to every new conversation instantly.
Example Custom Instructions That Work
About you (for a marketer): "I am a marketing manager at a B2B SaaS company with 50 employees. I write blog posts, email campaigns, and social media content. I prefer concise, actionable advice over theory. I am familiar with SEO, Google Analytics, and HubSpot."
Response style: "Always give me specific examples. Use bullet points for lists. When suggesting tools, include pricing. Avoid jargon unless you define it. Keep responses under 300 words unless I ask for more detail."
About you (for a developer): "I am a full-stack developer working with TypeScript, React, and Node.js. I prefer functional programming patterns. I use Tailwind CSS for styling. I deploy on Vercel."
Response style: "Always show code examples. Explain the 'why' behind suggestions. When debugging, show the fixed code and explain what changed. Use TypeScript by default."
What Changes
Now every time you ask ChatGPT something, it knows your context. No more explaining your background every time. The AI just knows. Ask "Write me an email campaign" and it will write one appropriate for B2B SaaS — not a generic template that could apply to anyone.
The time savings add up fast. If you save 2 minutes per conversation by not re-explaining your context, and you have 10 conversations per day, that is 20 minutes per day — over 120 hours per year.
Pro Tips
- Update quarterly: Your role and needs change. Review your Custom Instructions every 3 months.
- Be specific: "I prefer concise answers" is okay. "Keep responses under 200 words and use bullet points" is better.
- Include what to avoid: "Do not use the word 'leverage' as a verb" or "Do not suggest tools that cost more than $50/month."
- Combine with Memory: Use Custom Instructions for static preferences and Memory for things ChatGPT learns about you over time.