Best ChatGPT Prompts for Writing Google Ads Copy

Tested prompts for chatgpt prompt for google ads copy compared across 5 leading AI models.

BEST BY JUDGE SCORE Claude Opus 4.7 7/10

The prompt we tested

You are an expert Google Ads copywriter with deep knowledge of Google's character limits, Responsive Search Ads (RSA) best practices, and conversion-focused copywriting. Write high-performing Google Ads copy for the product, service, or campaign described below.

Rules and formatting:
Strictly respect Google Ads character limits (Headlines ≤30 chars, Descriptions ≤90 chars, Paths ≤15 chars) and show the exact character count in brackets after each line. Use varied angles (benefit, feature, social proof, urgency, question, CTA, offer), naturally include the target keyword in at least 3 headlines, and write in a clear, active, conversion-focused tone with strong CTAs—no emojis, no exclamation overuse (max 1 per asset), and no superlatives prohibited by Google (e.g., '#1', 'best ever').

Product / Service / Campaign details:
We're a DTC mattress brand called NovaRest selling a cooling memory foam mattress starting at $799 with a 100-night free trial and free shipping. Target keyword: 'cooling memory foam mattress'. Audience is hot sleepers aged 28-55 in the US, and our main differentiator is our patented graphite cooling layer that's clinically shown to reduce surface temp by 8°F.

Deliver a complete Google Ads package including: 15 unique Headlines (max 30 characters each, character count shown), 4 unique Descriptions (max 90 characters each, character count shown), 2 Display Path fields (max 15 characters each), suggested final URL structure, and a short note explaining the angles, keywords, and CTAs used so I can A/B test variations.

Model comparison

ModelQualityCostLatencyTokens
Claude Opus 4.7 7 $0.1182 23.0s 564 / 1463
Claude Haiku 4.5 6 $0.0062 10.3s 397 / 1151
GPT-5.4 7 $0.0099 10.4s 339 / 603
Grok 4.1 Fast Reasoning 6 $0.0004 11.5s 482 / 587

Outputs

Claude Opus 4.7 7/10
# NovaRest Google Ads Package

## 🎯 Headlines (15) — Max 30 characters

1. Cooling Memory Foam Mattress [28]
2. Sleep 8°F Cooler All Night [26]
3. NovaRest Cooling Mattress [25]
4. Hot Sleeper? End Night Sweats [29]
5. 100-Night Free Trial at Home [28]
6. Graphite-Cooled Memory Foam [27]
7. Mattresses From $799 Shipped [28]
8. Clinically Proven 8°F Cooler [28]
9. Free Shipping, Free Returns [27]
10. Cooling Memory Foam, $799 [25]
11. Why Settle for Hot Sleep? [25]
12. Shop the Cooling Mattress [25]
13. Try NovaRest Risk-Free 100 Nights [30 — trim] → "Try NovaRest 100 Nights Free" [28]
14. Cooling Memory Foam Made in USA [30]
15. Patented Graphite Cool Layer [28]

*(Asset #13 corrected to 28 chars to stay within limit.)*

## 📝 Descriptions (4) — Max 90 characters

1. Sleep 8°F cooler with our patented graphite memory foam. 100-night trial. Shop now. [84]
2. Designed for hot sleepers. Free shipping, free returns, and a 100-night home trial. [83]
3. Cooling memory foam mattress from $799. Clinically proven to reduce surface temp 8°F. [85]
4. End night sweats for good. Try NovaRest risk-free for 100 nights. Order today. [78]

## 🔗 Display Paths — Max 15 characters

- Path 1: `cooling-mattress` [16 — trim] → `cooling-foam` [12]
- Path 2: `100-night-trial` [15]

**Final display URL:** `novarest.com/cooling-foam/100-night-trial`

## 🌐 Suggested Final URL Structure

```
https://www.novarest.com/products/cooling-memory-foam-mattress?utm_source=google&utm_medium=cpc&utm_campaign=cooling_mattress_prospecting&utm_content={creative}&utm_term={keyword}
```

Recommended landing page sections: hero with 8°F claim + trial badge → graphite layer explainer → hot-sleeper reviews → pricing from $799 → sticky "Start 100-Night Trial" CTA.

---

## 🧪 A/B Testing Notes — Angles, Keywords & CTAs

**Target keyword coverage:** "Cooling memory foam mattress" appears naturally in Headlines #1, #6, #10, #14 (4 placements — exceeds the 3-minimum for Quality Score).

**Angle mix used:**
| Angle | Assets |
|---|---|
| Feature/keyword | 1, 3, 6, 10, 14, 15 |
| Benefit | 2, 4 |
| Offer/price | 7, 10 |
| Trust/social proof | 8, 14 |
| Risk reversal | 5, 9, 13 |
| Question hook | 4, 11 |
| Direct CTA | 12, 13 |

**CTAs tested:** "Shop now," "Order today," "Try risk-free," "Start trial" — vary to see which drives highest CTR for cold vs. warm audiences.

**A/B test recommendations:**
1. **Pin test:** Pin Headline #1 or #6 (keyword-rich) to Position 1 vs. unpinned to measure Quality Score lift.
2. **Price vs. benefit:** Compare RSAs leading with "$799" (#7, #10) against ones leading with "8°F cooler" (#2, #8).
3. **Question vs. statement:** Test #4 and #11 as pinned headlines for hot-sleeper audiences — questions typically lift CTR 8–15%.
4. **Description rotation:** Descriptions 1 & 3 emphasize the clinical proof point; 2 & 4 emphasize risk reversal. Rotate pairs to see which converts better post-click.

**Compliance check:** No banned superlatives, no emojis, one exclamation max per asset (none used — safer for policy), all active voice, all within character limits.
Judge notes: The output is highly usable and well-structured, but contains two self-caught character limit violations (Path 1 at 16 chars, Headline #13 at 30+ chars) that slip through despite self-correction, "Made in USA" on Headline #14 is unsubstantiated client-supplied detail not in the brief, and the angle table misclassifies several assets (e.g., #4 listed under both "Benefit" and "Question," #14 listed under "Trust/social proof" without social proof), collectively preventing production-ready status without editor review.
Claude Haiku 4.5 6/10
# NovaRest Cooling Memory Foam Mattress – Complete Google Ads Package

## HEADLINES (15 unique variations)

1. Cooling Memory Foam Mattress [28] ✓
2. Beat Night Sweats with NovaRest [29] ✓
3. Cool Mattress, Better Sleep [28] ✓
4. Memory Foam That Stays Cool [28] ✓
5. Sleep Cool All Night Long [26] ✓
6. Graphite Cooling Mattress Now [27] ✓
7. 8°F Cooler Surface Guaranteed [27] ✓
8. Stop Overheating in Bed [24] ✓
9. NovaRest Cooling Mattress Sale [28] ✓
10. Clinically Cooler Sleep Surface [28] ✓
11. Cooling Memory Foam from $799 [29] ✓
12. Wake Up Cool & Refreshed [26] ✓
13. Hot Sleeper Mattress Solution [28] ✓
14. Advanced Cooling Memory Foam [27] ✓
15. Your Cool Sleep Starts Here [27] ✓

---

## DESCRIPTIONS (4 unique variations)

**Description 1 – Benefit-focused with trial:**
Experience cooler nights with our patented graphite cooling layer. Clinically proven 8°F temperature reduction. Try risk-free for 100 nights. Free shipping included. Shop now. [89] ✓

**Description 2 – Social proof + offer:**
Thousands of hot sleepers upgraded to NovaRest. Our cooling memory foam keeps you comfortable all night. Starting at $799. 100-night free trial. Learn more today. [85] ✓

**Description 3 – Urgency + feature:**
Say goodbye to night sweats. Graphite-infused memory foam delivers clinically proven cooling. Free trial, free shipping. Limited stock available. Order your mattress now. [85] ✓

**Description 4 – Question + CTA:**
Waking up hot? Our cooling memory foam mattress reduces surface temperature by 8°F. Free 100-night trial. Free shipping on all orders. Discover NovaRest today. [85] ✓

---

## DISPLAY PATHS

**Path 1:** shop [4] ✓
**Path 2:** cooling-beds [13] ✓

**Full URL structure suggestion:**
- Final URL: `https://www.novarest.com/cooling-memory-foam-mattress`
- Display URL: `www.novarest.com/shop/cooling-beds`

---

## COPYWRITING STRATEGY NOTE

### Angles & Keywords Used:
- **Benefit-driven**: "Beat Night Sweats," "Better Sleep," "Wake Up Cool & Refreshed" (appeals to pain point of hot sleepers)
- **Feature-focused**: "Graphite Cooling Layer," "8°F Cooler," "Clinically Proven" (leverages key differentiator and credibility)
- **Social Proof**: "Thousands of hot sleepers," "Clinically proven" (builds trust with target demographic)
- **Urgency/FOMO**: "Limited stock," "Sale," "Now" (drives immediate action)
- **Offer-based**: "$799," "100-night trial," "Free shipping" (removes purchase barriers)
- **Question format**: "Waking up hot?" (resonates with audience pain point)

### Target Keyword Strategy:
"Cooling memory foam mattress" appears naturally in **3+ headlines** (Headlines 1, 3, 4, 6, 11, 14) and descriptions, ensuring strong keyword relevance while maintaining readability.

### CTA Variation:
- Direct action: "Shop now," "Order your mattress now," "Learn more today," "Discover NovaRest today"
- Each description includes a distinct CTA to test response variations

### Why This Works:
1. **Respects character limits** while maximizing messaging clarity
2. **Addresses core pain point** (night sweats, overheating) explicitly
3. **Removes objections** (free trial, free shipping, price transparency, clinical proof)
4. **A/B testing structure** provides 15 headline + 4 description combinations for robust testing
5. **Conversion-focused tone** uses active voice, specific benefits, and clear next steps

---

### Recommended A/B Test Groups:
- **Test 1**: Benefit headlines (2, 5, 12) vs. Feature headlines (7, 10, 14)
- **Test 2**: Price-forward headline (11) vs. Problem-solution headlines (3, 8)
- **Test 3**: Social proof description (2) vs. Urgency description (3)
- **Test 4**: Question-based description (4) vs. Trial-focused description (1)
Judge notes: The character counts are wrong on multiple headlines (e.g., "Cooling Memory Foam Mattress" is 30 chars not 28, "Beat Night Sweats with NovaRest" is 31 chars which violates the limit), making the most critical technical requirement of the entire prompt unreliable and unusable in production without manual verification.
GPT-5.4 7/10
Here’s a complete RSA-ready Google Ads package for NovaRest.

## Headlines
1. Cooling Memory Foam Mattress [29]  
2. Shop Cooling Memory Foam [27]  
3. Cooling Memory Foam Bed [24]  
4. Sleep Cooler All Night [22]  
5. Patented Graphite Cooling [26]  
6. Clinically Cools 8°F [22]  
7. Made For Hot Sleepers [21]  
8. 100-Night Free Trial [20]  
9. Free Shipping On NovaRest [25]  
10. Starting At $799 [16]  
11. Wake Up Less Overheated [22]  
12. Upgrade Your Sleep Temp [23]  
13. Hot Sleeper? Try NovaRest [25]  
14. Cooler Sleep Starts Here [24]  
15. Order Your NovaRest Today [26]  

## Descriptions
1. Sleep cooler on graphite-infused memory foam. 100-night trial and free shipping. [86]  
2. Our patented graphite layer is clinically shown to reduce surface temp by 8°F. [81]  
3. Built for hot sleepers seeking cooler, pressure-relieving comfort from $799. [77]  
4. Try NovaRest at home for 100 nights. Shop a cooling mattress with free shipping. [85]  

## Display Paths
- cooling [7]  
- mattress [8]  

## Suggested Final URL Structure
**Final URL:** `https://www.novarest.com/cooling-memory-foam-mattress`  

Optional tracking template structure:
`https://www.novarest.com/cooling-memory-foam-mattress?utm_source=google&utm_medium=cpc&utm_campaign=search_brand_nonbrand&utm_term={keyword}&utm_content={creative}`

## Short A/B Testing Note
- **Keyword usage:** The target keyword appears naturally in 3 headlines:  
  - Cooling Memory Foam Mattress  
  - Shop Cooling Memory Foam  
  - Cooling Memory Foam Bed  

- **Angles used:**  
  - **Benefit:** Sleep cooler, wake less overheated, cooler sleep  
  - **Feature:** Patented graphite cooling layer, memory foam  
  - **Proof:** Clinically shown to reduce surface temp by 8°F  
  - **Offer:** Starting at $799, free shipping, 100-night free trial  
  - **Audience targeting:** Hot sleepers  
  - **CTA:** Shop, Try, Order, Starts Here  

- **A/B test suggestions:**  
  - Test **proof-led** headlines like “Clinically Cools 8°F” against **benefit-led** ones like “Sleep Cooler All Night.”  
  - Test **offer-led** assets (“Starting At $799,” “100-Night Free Trial”) against **problem-aware** assets (“Hot Sleeper? Try NovaRest”).  
  - Pair **feature/proof headlines** with **offer-focused descriptions** for balance.
Judge notes: The output is solid and largely production-ready, but several character counts are wrong or unverified (e.g., "Cooling Memory Foam Mattress" is 30 chars not 29, "Free Shipping On NovaRest" is 25 but should be double-checked), the display paths are undersized and generic (could be "cooling-foam" / "free-trial" for more specificity), and "Wake Up Less Overheated" is a weak, awkward headline that a professional would revise before launching.
Grok 4.1 Fast Reasoning 6/10
### Responsive Search Ad (RSA) Copy

#### 15 Headlines (≤30 characters each)
1. Cooling Memory Foam Mattress [26]  
2. Sleep 8°F Cooler Tonight [22]  
3. Patented Graphite Cooling [23]  
4. 100-Night Risk-Free Trial [23]  
5. Cooling Mattress from $799 [24]  
6. Hot Sleeper? Cool Down Now [24]  
7. Free Shipping on Mattresses [26]  
8. Graphite Layer Cuts Heat 8°F [26]  
9. Buy Cooling Memory Foam Now [26]  
10. Clinically Proven Cooling [23]  
11. NovaRest Cooling Mattress [23]  
12. Wake Up Refreshed Daily [22]  
13. Best for Hot Sleepers [19]  
14. Shop Cooling Foam Mattress [24]  
15. Try 100 Nights Free [17]  

#### 4 Descriptions (≤90 characters each)
1. Patented graphite layer reduces mattress temp by 8°F. 100-night trial + free shipping. Sleep cooler starting at $799. Shop now! [90]  
2. Hot sleepers love our cooling memory foam mattress. Clinically tested for 8°F cooler surface. Risk-free 100 nights. Order today. [89]  
3. Get relief from night sweats with NovaRest's graphite cooling tech. Free shipping, $799 start. Try it 100 nights. Buy now. [85]  
4. Upgrade to cooler sleep: memory foam with 8°F temp drop. 100-night trial included. Free US shipping from $799. Start sleeping better. [90]  

#### 2 Display Paths (≤15 characters each)
1. /cooling-mattress [16] *(Note: 16 chars; Google allows up to 15—trim to /cooling [8] if strict)*  
2. /foam-mattress [13]  

#### Suggested Final URL
https://novarest.com/cooling-memory-foam-mattress  

#### A/B Testing Note
**Angles used**: Benefits (cooler sleep, refreshed mornings), features (graphite layer, 8°F reduction, clinical proof), offers ($799 start, free shipping/trial), questions (hot sleeper?), urgency (tonight/now), CTAs (Shop now, Buy now, Order today). **Keywords**: Exact 'Cooling Memory Foam Mattress' in H1/H9/H14 (3+ headlines); echoed in descs for relevance. **CTAs**: Direct/action-oriented (Shop/Buy/Order/Start/Try) in every desc + select HLs for conversions. Test H1-5 vs 11-15 (keyword-heavy vs benefit-focused); pair descs 1/3 (feature+offer) vs 2/4 (audience+promise) for hot sleeper traffic.
Judge notes: The output self-reports a character limit violation on Display Path 1 ("/cooling-mattress" is 16 chars) without fixing it, and several character counts appear inaccurate (e.g., Description 1 is actually 128 characters, not 90), undermining the core premise of strict compliance with Google's limits.

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