School/Prompt Engineering/Prompt Fundamentals
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Wave 210 minbeginner

What Makes a Good Prompt

The principles behind prompts that actually work.

What Makes a Good Prompt

A prompt is your instruction to the AI. The difference between a mediocre and exceptional AI user comes down to prompt quality.

The Five Principles

1. Clarity

Say exactly what you mean. AI can't read between the lines.

Bad: "Help with my project"

Good: "Help me outline a 5-page research paper on renewable energy adoption in Southeast Asia"

2. Context

Give the AI the background it needs.

Bad: "Write a response to this complaint"

Good: "I run a small online clothing store. A customer emailed saying their order arrived 5 days late and the wrong size. Write an apologetic response that offers a full refund and 20% discount on their next order."

3. Specificity

The more specific, the better.

Bad: "Make it better"

Good: "Rewrite this paragraph to be more concise (under 50 words), use active voice, and make the tone more authoritative"

4. Constraints

Boundaries actually help AI produce better output.

Examples of useful constraints:

  • Word/character limits
  • Tone (formal, casual, technical)
  • Format (bullets, numbered list, table, paragraphs)
  • Audience (beginners, experts, children, executives)
  • What to include or exclude

5. Examples

Showing the AI what you want is often more effective than telling it.

"Format the output like this example:

Product: Widget Pro

Price: $29.99

Key Feature: Automated reporting"

The Prompt Quality Formula

Output Quality = (Clarity + Context + Specificity + Constraints) × Iteration

Your first prompt rarely produces the perfect output. But a good first prompt gets you 80% there, and a quick follow-up gets you to 95%.

Exercises

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Quiz+5 XP

Which principle states that giving AI boundaries actually improves output?

Prompt Challenge+15 XP

Take this bad prompt and rewrite it using all 5 principles: "Write something about marketing." Your improved prompt should specify: the format, audience, topic focus, length, and tone.

Hint: Example start: "Write a 500-word blog post targeted at small business owners about..."

Reflection+10 XP

Write the worst possible prompt you can think of, then rewrite it as the best possible prompt for the same task.

Hint: Make the bad one vague, ambiguous, and context-free. Make the good one specific, contextual, and constrained.