Copywriting with GPT - AI Marketing Copy Writing Know-how

Introduction

"How do I express this product's advantages in one sentence?" Can't squeeze out good copy even after wracking your brain? I've been there too. When I was a marketing newbie, I'd agonize for hours over copy for one product promotion. I'd write dozens, but none felt right, and when I showed them to teammates, they'd just say "Hmm... it's okay I guess?"

Hiring a professional copywriter costs tens of thousands of dollars per piece, but using ordinary copy feels like it'll reduce ad effectiveness... Everyone has these concerns, right?

But now AI can become your personal copywriter. Just input product information and it creates dozens of ad copies in seconds. In various styles too.

The Power of AI Copywriting

Claude or ChatGPT has learned copy from countless successful ad campaigns worldwide. From legendary copy like Apple's "Think Different" and Nike's "Just Do It" to recently trending SNS ad copy.

So just tell AI about your product features and it can instantly generate effective copy matching your brand tone. When I actually tested it, over 40% of AI-generated copy was immediately usable, and the rest just needed minor tweaks.

It's especially useful for A/B testing. To improve ad effectiveness, you need to test multiple versions, but it takes a day for a person to create 10 different versions while AI does it in 5 minutes.

Real Example 1: Product Ad Copy

My Input:

Product: Wireless earbuds "SoundFree Pro"
Features:
- 40-hour battery
- Noise cancelling
- Ultra-light 4g

Create 10 ad copies. Short and impactful.

Claude's Response:

🎧 SoundFree Pro Ad Copy Top 10

1. Problem-Solving Type

"40 hours commuting, no more charging worries"

2. Comparison Emphasis Type

"4g lightness, 40 hours of freedom"

3. Question Type

"Still charging every day?"

4. Emotional Type

"Turn off the world's noise, turn on your music"

5. Number Emphasis Type

"4g × 40 hours = Perfect freedom"

6. Command Type

"Forget the weight, forget the noise"

7. Contrast Type

"Light on ears, deep in music"

8. Story Type

"From morning commute to weekend travel, on one charge"

9. Trend Expression Type

"The real deal of truly wireless"

10. Promise Type

"Immerse yourself in your own world for 40 hours"

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💡 Each Copy's Use Case:

• 1, 3, 6: Instagram ad headline
• 2, 5, 7: Banner ad main copy
• 4, 8, 10: Brand page introduction
• 9: SNS targeting young audience

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Real Example 2: Platform-Specific Copy Variations

My Input:

Transform "4g lightness, 40 hours of freedom"
from above for each platform.

1. Instagram ad (short and impactful)
2. Facebook ad (with explanation)
3. Google search ad (30-character limit)
4. Naver blog thumbnail (curiosity-inducing)

Claude's Response:

📱 Platform-Optimized Copy

1. Instagram Ad

Headline:
4g lightness
40 hours of freedom

Body:
Forget the weight the moment you put them in 🎧
Music for a whole week without charging 🔋

20% off for purchases now →

#WirelessEarbuds #SoundFreePro #UltraLight

Visual Guide:

• Image: Earbuds on fingertip (emphasize lightness)
• Colors: White/blue (trust, tech feel)

---

2. Facebook Ad

Title:
Just 4g, but gifts 40 hours of freedom

Body:
Are heavy and uncomfortable earbuds bothering you?
SoundFree Pro is feather-light at 4g.
So light you won't even know you're wearing them.

Plus 40 hours on a single charge!
5 days commuting + weekend workout + evening walk
Enjoy all week without charging worries.

✅ Ultra-light 4g
✅ 40-hour battery
✅ Premium noise cancelling
✅ IPX7 waterproof

Today only special price 79,000 won (regular 99,000 won)
👉 Buy now

#WirelessEarbuds #UltraLight #LongBattery

Targeting Suggestions:

• Age: 25-45
• Interests: Music, exercise, commuting, technology
• Behavior: Online electronics buyers

---

3. Google Search Ad

Headline 1: 4g ultra-light wireless earbuds
Headline 2: 40-hour battery SoundFree
Headline 3: Today only 20% off

Description 1: Feather-light 4g, a week without charging
Description 2: Premium noise cancelling free shipping

Display URL: soundfree.com/pro
Final URL: soundfree.com/product/pro?ad=google

Keyword Suggestions:

• Exact match: [wireless earbuds], [ultra-light earbuds]
• Phrase match: "long battery earbuds"
• Broad match: light earbuds

---

4. Naver Blog Thumbnail

Large text (top):
What's special about 4g?

Medium text (center):
Secret of 40-hour earbuds

Small text (bottom):
Actual review (shocking)

Thumbnail Design:

• Background: Yellow (click inducing)
• Image: Earbuds on fingertip photo
• Speech bubble: "Is this really 4g?"

---

Real Example 3: Copy Tone & Manner Adjustment

My Input:

Same product, but I want to change tone by target.

Target 1: 20-30s college students/workers (casual)
Target 2: 40-50s workers/executives (professional)
Target 3: Exercise enthusiasts (active)

Claude's Response:

🎯 Target-Specific Copy Differentiation

Target 1: 20-30s College Students/Workers

Tone: Friendly and relatable, meme usage

Copy:

Headline:
"Commute battery 🪫 for real?"
→ SoundFree lasts a week ez

Body:
Literally 4g (provable)
One charge covers Mon-Fri commute
Lunchtime YouTube ok too

Price is a steal: 79,000 won
(1,000 Americanos worth)

Go go 👉 [Purchase link]

#GodValue #WirelessEarbuds #CommuterGear

Emojis Used: 🔋🎧💯🔥 Hashtag Style: #~er #~gear #lit

---

Target 2: 40-50s Workers/Executives

Tone: Professional and trustworthy

Copy:

Headline:
New Standard of Premium Sound
SoundFree Pro

Body:
A choice that elevates daily quality.

• Ultra-light 4g titanium alloy body
  → Zero fatigue even with long wear

• 40-hour continuous playback
  → No charging worries on business trips

• Hybrid ANC noise cancelling
  → Perfect focus anywhere - plane, office

A premium tool that enhances work efficiency,
experience it now.

Regular 99,000 won → Launch special 79,000 won
Free shipping / 2-year quality warranty

👉 See product details

#PremiumAudio #BusinessEarbuds

Emojis Used: Minimized (only when necessary) Hashtag Style: Specific and professional

---

Target 3: Exercise Enthusiasts

Tone: Energetic and motivating

Copy:

Headline:
Runs 40 hours strong
Your running mate, SoundFree Pro

Body:
Morning run 🏃‍♂️
Lunch weights 💪
Evening cycling 🚴
Weekend hiking 🥾

True partner for the whole week.

💧 IPX7 waterproof: No sweat, rain worries
🎵 Low latency mode: Perfect rhythm sync
⚡ 40-hour battery: Triathlon OK
🪶 4g ultra-light: Zero shake

Work out hard, music clear.

Buy now get sports pouch 🎁
👉 GET IT NOW

#Running #HomeWorkout #ExerciseGear #SportsEarbuds

Emojis Used: Actively use exercise/energy related Hashtag Style: #~gear #motivation #exercise related

---

Real Example 4: A/B Testing Copy Set

My Input:

Preparing Facebook ad A/B testing.
Same product, different selling points
Create 5 copy versions.

Claude's Response:

🧪 A/B Testing Copy Set

Option A: Price Appeal

Headline: 100k earbuds performance, 70k price

Body:
Premium brand earbud specs without envy
- 40-hour battery (2x Apple)
- 4g ultra-light (30% lighter than Samsung)
- Hybrid ANC

But half the price?
Today only 79,000 won

CTA: Check special price

Expected Response: Price-sensitive, value seekers

---

Option B: Problem Resolution

Headline: Ears hurt from earbuds?

Body:
"Ears hurt after just 1 hour"
"Heavy ones fall out during exercise"

SoundFree Pro is different.
Feather-light 4g, ergonomic design
Comfortable all day long.

Choice considering ear health.

CTA: Experience comfort

Expected Response: Customers dissatisfied with existing earbuds

---

Option C: Battery Emphasis

Headline: Still charging every day?

Body:
Ever had them die during commute?
SoundFree Pro charges once a week.

Mon: Commute (3 hours)
Tue: Commute + lunch YouTube (4 hours)
Wed: Commute + workout (5 hours)
Thu: Commute (3 hours)
Fri: Commute + evening podcast (4 hours)
Weekend: Travel/hiking (10 hours)

= Total 29 hours
Comfortable 40-hour battery!

CTA: Free from charging stress

Expected Response: Active workers, travelers

---

Option D: Noise Cancelling Emphasis

Headline: Button to turn off the world, ANC

Body:
Subway noise ❌
Office chatter ❌
Cafe commotion ❌

Focus on your world with
hybrid noise cancelling.

Work focus 200% ↑
Music immersion 300% ↑

Experience a quiet world now.

CTA: Start focusing

Expected Response: Focus-critical jobs (developers, writers, etc.)

---

Option E: Premium Experience

Headline: Premium sound that changes daily life

Body:
'Listening' to music vs 'experiencing' it is different.

SoundFree Pro lets you
meet studio quality sound
in daily life.

Morning commute → Concert hall
Lunch break → Cafe lounge
Evening workout → Club beat

Make your day special.

CTA: Experience premium

Expected Response: Sound quality sensitive, audio enthusiasts

---

Real Example 5: Email Subject Lines

My Input:

Preparing email marketing campaign.
Subject line is crucial for open rates,
Create 20 effective subject lines.

Claude's Response:

📧 Email Subject Lines Top 20

Urgency Inducing (6)

1. ⏰ Ends midnight today: 40% off (last chance)
2. 🚨 Restock alert: SoundFree Pro (24-hour limited)
3. ⚠️ [Name], cart items selling out soon
4. ⏳ 3 hours left: Early bird special ends
5. 🔥 Order now arrives tomorrow (same-day shipping ends in 6 hours)
6. ⚡ 100 limited special, currently 12 left

Curiosity Inducing (5)

7. 79,000 won for over 100,000 won value?
8. Feature even Apple would envy included
9. Are these earbuds really 4g? (test results)
10. Secret of 40-hour battery (hint: technology)
11. Why 98% of workers chose this?

Benefit Emphasis (5)

12. 🎁 3 free gifts with purchase (50,000 won value)
13. ✨ SoundFree Pro + wireless charger set (49,000 won off)
14. 💝 Write review get 10,000 won back
15. 🎉 Launch 50% off coupon sent
16. 📦 Order today free shipping + 3x points

Personalization (2)

17. [Name], ultra-light earbuds you wanted are in stock
18. Special offer for [Name] (VIP customers only)

Social Proof (2)

19. ⭐ 5-star review 1,000+ celebration event
20. 👥 2,847 people bought these earbuds this week

---

📊 Subject Line Effectiveness Prediction:

Type	Expected Open Rate	Expected CTR	Recommended Timing
Urgency	35-45%	High	Promotion ending soon
Curiosity	25-35%	Medium	New product intro
Benefit Emphasis	30-40%	High	Discount events
Personalization	40-50%	Very High	Restock alerts
Social Proof	20-30%	Medium	Building trust

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Prompt Templates

Basic Template

Product/Service: [name]
Key features:
- [Feature 1]
- [Feature 2]
- [Feature 3]

Target: [age/gender/job/interests]
Tone & Manner: [casual/professional/humorous/emotional]

Create [N] ad copies.
[Short/long] [selling point: price/function/emotion etc]

Advanced Template

Copywriting request:

[Product Information]
- Name: [product name]
- Category: [industry]
- USP: [differentiation]
- Price: [amount]
- Target: [persona]

[Goal]
- Purpose: [awareness/conversion/branding]
- Platform: [Instagram/Facebook/Google Ads]
- Ad format: [image/video/carousel]

[Constraints]
- Character count: [max/min]
- Must include keywords: [required words]
- Avoid expressions: [forbidden words]

[Benchmark]
- Reference copy: [Example 1], [Example 2]
- Competitor copy: [example]

Create [N] copies with expected effectiveness for each.

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Pro Tips

1. Copy Evaluation Criteria

When evaluating AI-generated copy:

[Prompt]
Analyze and rank the following copies.
Evaluation criteria: Clarity, differentiation, emotion, call-to-action

Copy 1: [content]
Copy 2: [content]
Copy 3: [content]

2. Copy Improvement Request

[Prompt]
Make this copy more impactful:
"SoundFree Pro, 40-hour battery"

Improvement direction:
- Emphasize numbers
- Clarify customer benefit
- Compress to one sentence

3. Competitor Copy Analysis

[Prompt]
Analyze 3 competitor copies:

1. [Competitor A copy]
2. [Competitor B copy]
3. [Competitor C copy]

Analyze each copy's strategy and strengths,
and suggest copy directions we can differentiate with.

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Conclusion

AI is now more than just a tool - it's a copywriter's partner. Create hundreds of versions instantly, A/B test them, and find the optimal copy. The important thing is refining AI's draft into our brand language!

In the next post, we'll work with AI on defining target customers through 'persona setting'.

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💡 Today's Tip: Run the same prompt 3 times to get 30 copies, then combine the best elements for perfect copy!