What is Prompt AI?
Prompt AI is the command or instruction you give to AI (ChatGPT, Claude, Gemini) to get the desired result. The better the prompt — the better the result. This is the most important skill in the AI era.
In 2026, people who know how to write prompts will have a significant advantage in their work and business. It’s not that AI replaces you — but people who know how to use AI will replace those who don’t. This page summarizes the prompt system I use daily.
Why Do You Need a Prompt System?
Random prompts = random results. A prompt system helps you:
- Save time: No need to think from scratch every time you use AI
- Get consistent results: Same prompt = same quality output
- Easily delegate: Share prompts with your team, everyone uses the same standard
- Improve continuously: Save good prompts, refine them over time
Framework for Writing Prompts
RACEO Framework
This is the framework I use most often:
- Role (role): “You are an SEO expert with 10 years of experience”
- Action (action): “Write a 1500-word blog post on topic X”
- Context (context): “The reader is a beginner, knows nothing about SEO”
- Example (example): “Writing style like Neil Patel — easy to understand, with specific numbers”
- Output (output): “HTML format, with H2, H3, bullet points, tables”
Complete RACEO Prompt Example
“You are an SEO expert with 10 years of experience. Write a 1500-word blog post on how to optimize content for AI search. The reader is a WordPress website owner who wants to update SEO for 2026. Practical style, with specific numbers from Google and McKinsey. Output in HTML format, with H2, H3, short paragraphs 2-3 sentences, ending with an FAQ section.”
Prompt Library by Industry
SEO and Content
- Keyword research: “Analyze the keyword [keyword] on Google Suggest, PAA, and related searches. Suggest 10 topic clusters with estimated search volume.”
- Content outline: “Create an outline for the article [topic] with: 1 H1, 5-7 H2, each H2 has 2-3 H3. Each section leads to sources from the top 3 competitors.”
- Meta description: “Write 5 meta descriptions for the article [topic], each under 160 characters, containing the target keyword. Include CTR estimate for each option.”
- Internal link suggestions: “Based on the content of this article, suggest 5 internal links to other articles. Explain the reason for each link.”
Marketing
- Email copy: “Write an email sequence of 5 emails for the launch campaign of product [product name]. Each email is 50-100 words long. Include subject line A/B test.”
- Ad copy: “Create 10 headlines + 5 descriptions for the Google Ads campaign. Keyword: [keyword]. Tone: urgent but professional.”
- Social media: “Write 5 LinkedIn posts on the topic [topic]. 200-300 words long, with a hook at the beginning of the sentence, ending with a CTA. Thought leadership style.”
- Landing page: “Outline the landing page for [product]. Structure: hero → problem → solution → features → social proof → CTA. Write copy for each section.”
Code and Technology
- WordPress plugin: “Write a simple WordPress plugin with the function [description]. Use WordPress coding standards. Include readme.txt and inline comments.”
- API integration: “Write PHP code to connect to the Google Search Console API, retrieve the latest 30 days of data. Handle rate limiting and error handling.”
- Database query: “Optimize this MySQL query: [query]. Add index if needed. Explain according to the execution plan.”
- Code review: “Review this code: . Find bugs, security issues, performance problems. Fix the code according to best practices.”
Best Practices for Writing Prompts
- Clear: Describe in detail, without ambiguity. “Write an article about SEO” is much worse than “Write a 2000-word article about SEO for WordPress in 2026, targeting new users.”
- With examples: Show the AI the desired output. If you want a formatted table — provide an example table.
- Iterative: Write a prompt → view the output → refine → try again. A perfect prompt is achieved after 3-5 refinements.
- With enough context: The more context, the better. Target audience, tone, goals, constraints.
- Output format: Specify a specific format: HTML, Markdown, JSON, CSV, table.
Frequently Asked Questions
How long should a prompt be? Longer is usually better — because there’s more context. But don’t make it too long. 200-500 words are suitable for most tasks.
Which AI is the best? Claude is good for in-depth analysis and long writing. ChatGPT is good for creativity and diversity. Gemini is good for research and handling long documents. Perplexity is good for real-time research. Each AI has its strengths — learn to use all three.
How to get good at writing prompts? Practice every day. Record good prompts. Build your own prompt library. Learn from others’ prompts. Most importantly: understand what you want before writing a prompt.
The prompt library is compiled by Xuân Hiếu for real-world content/SEO workflows. See more about the creator at Phạm Xuân Hiếu — official profile.