2026 ChatGPT Prompt Guide: AI Prompt Formula, SEO Use Cases, and Examples - 虎鯨數位行銷 OrcaBiz SEO|AI SEO公司

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2026 ChatGPT Prompt Guide: AI Prompt Formula, SEO Use Cases, and Examples

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2026-06-14 更新

If you want ChatGPT to answer more accurately, the key is not just asking a question. You need to write a clear ChatGPT prompt. A prompt is basically the work brief you give AI: what role it should play, what task it should complete, what background to use, what format to output, and what it should not invent.

This guide summarizes modern prompt-writing practices for 2026, including OpenAI recommendations, ready-to-use prompt formulas, SEO / AI SEO / GEO examples, common mistakes, medical-content cautions, and FAQs.

ORCABIZ CONSULTANT NOTE

OrcaBiz note: A good prompt is not a magic spell. It is a clear description of the task, context, limits, format, and review criteria. For SEO, medical, legal, and financial content, AI can help structure the work, but a human review is still required.

Quick summary

  • What is a prompt: the instructions, questions, data, and constraints you give ChatGPT.
  • The core of a good prompt: task, background, output format, tone, limitations, and review criteria.
  • Do not just say: “write an article.” Say who it is for, what it is about, the tone, and the output format.
  • SEO use cases: search intent, article structure, FAQs, titles, meta descriptions, and internal link ideas.
  • Important: AI can make mistakes, so medical, legal, financial, and contract-related content must be checked by a human.

What is a ChatGPT prompt?

OpenAI describes a prompt as the input that starts a model response. It can be text, and in some cases images or audio as well. Prompt engineering is the process of designing and refining the input so the model produces a more useful result.

Put simply, a prompt is like giving a colleague a work brief. If you only say “help me with this,” the result is often vague. If you explain the goal, audience, format, and deadline, the output becomes much more reliable. ChatGPT works the same way.

Prompt formula: role, task, background, format, constraints

You are [role]. Based on [background], complete [task]. The target audience is [audience], and the tone should be [tone]. Please output in [format] and follow [constraints]. Finally, check for [review criteria].

For example, if you want an SEO article outline, you could write:

You are an SEO consultant. Based on the product details below, plan an article outline for a service page. The target audience is business owners looking for a Taiwan SEO company and AI SEO optimization service. Please output: H1, 5 H2s, key points for each section, 6 FAQs, and internal link suggestions. Use a friendly professional tone and do not promise rankings. Finally, check for repeated headings.

OpenAI guidance

OpenAI’s Help Center and Academy both emphasize the same ideas: be clear and specific, provide enough context, can specify tone, and iterate. There is no perfect prompt on the first try. It is more like a conversation with AI.

  • Be specific: say how many points you want, who the output is for, and what it will be used for.
  • Provide context: add brand details, audience background, and constraints so the model does not guess.
  • Specify tone: friendly, professional, formal, conversational, or suitable for Taiwan readers.
  • Specify format: table, bullet list, FAQ, Markdown, JSON, or article outline.
  • Refine repeatedly: if the first draft is weak, tell the model what to fix and ask again.

Common prompt examples

Basic Q&A

Explain SEO in a way a general Taiwan reader can understand, and list 3 common misunderstandings for beginners.

Role-play

You are an SEO consultant with 10 years of experience. Please give 5 local-search growth suggestions for a newly launched dental clinic site. Avoid exaggerated claims or ranking guarantees.

Structured output

Organize the following content into a table with these columns: user question, search intent, suggested H2, and possible FAQ. Content: [paste data]

Draft creation

Write an 800-word first draft on “What is AI SEO?” Include an intro, 3 H2s, and 3 FAQs. Use a friendly professional tone and avoid vague marketing buzzwords.

Review and rewrite

Check the article below for AI-writing traces, repeated sentences, exaggerated claims, and missing sources. Please list the issues and rewrite suggestions in a table.

How to use prompts for SEO / AI SEO / GEO

If you are working on SEO or AI SEO / GEO, do not only ask AI to “write an article.” A better use is to treat AI as a research assistant, editor, and checker.

  • Search intent: classify keywords as informational, comparison, purchase, or local intent.
  • Structure: ask AI to plan H2s and H3s based on intent instead of generic outlines.
  • FAQ: ask for the questions users actually ask, with concrete answers.
  • Source check: ask which sentences need official sources or data support.
  • AI search testing: test brand names, service names, and question-style keywords in ChatGPT, Gemini, and Perplexity.

Use extra caution for medical content

Medical content is one of OrcaBiz’s key focus areas, including dental care, fertility, reproductive medicine, rehabilitation, health media, and patient education. ChatGPT can help organize structure, FAQs, and educational points, but it should not become the final authority.

  • Include doctors, experts, or reliable sources.
  • Avoid promising results or creating fear.
  • Treatment, medicine, diagnosis, and risk explanations should be reviewed by professionals.
  • Check whether the output is outdated or not appropriate for the Taiwan context.
  • Be careful with the boundary between medical advertising and educational content.

Common mistakes and improvements

Common mistake Why it is bad Better prompt
“Write an article.” Too vague; the AI does not know the topic, audience, or format. Write an 800-word article on AI SEO for business owners, with 5 H2s and 5 FAQs.
“Give me marketing advice.” No industry, goal, or constraints. Give 5 legal, non-exaggerated content marketing ideas for a Taiwan dental clinic.
“Make it more professional.” “Professional” is not defined. Rewrite it in a friendly professional tone, using Taiwan-friendly language and avoiding empty slogans.
“Find the latest info.” No source or date specified. Use official sources to summarize the latest 2026 information and list links and update dates.

FAQ

Q1: What is a ChatGPT prompt?

A: It is the instruction, question, or background information you give AI. The clearer the prompt, the closer the result will be to your needs.

Q2: How do I write an effective prompt?

A: Use “role + task + background + constraints + format + review criteria.”

Q3: Can ChatGPT write SEO articles directly?

A: It can generate drafts and outlines, but you should not publish them without human review, keyword planning, internal links, and source checking.

Q4: How should I prompt for AI SEO / GEO?

A: Ask for questions, tables, FAQs, schema drafts, source lists, and summaries that are easy for AI search systems to understand.

Q5: Can medical content be written with ChatGPT?

A: It can help with drafts and structure, but it should not replace a doctor or expert review.

Q6: What are the most common mistakes?

A: Being too vague, not giving context, not specifying format, not asking for source checks, and trying to do too many tasks at once.

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