What Is a Google Product Carousel Ad?
A Google product carousel ad shows 2 to 10 swipeable product images inside a single ad unit. Each card can carry its own headline and final URL.
How carousel ads differ from single-image ads
Single-image ads display one product, one message. Carousel ads let you show a product range, tell a story, or highlight different features across multiple cards. More surface area, same budget.
Where carousel ads appear on Google
Carousel ads run through Demand Gen campaigns. Per Google's Ads Help Center, they appear on YouTube (in-feed and Shorts), Gmail, and Google Discover. That placement mix gives you broad reach across Google's owned surfaces.
---
Carousel Ad Asset Requirements
Get your assets right before you start building. Wrong specs slow down approval.
Image dimensions and file sizes
Per Google's Ads Help Center, the supported aspect ratios are:
- Horizontal 1.91:1: 1200x628px recommended, 600x314px minimum
- Square 1:1: 1200x1200px recommended, 300x300px minimum
- Vertical 4:5: 960x1200px recommended, 480x600px minimum
All images must be 5MB or less. Accepted formats: JPEG, PNG, GIF.
Text fields: headlines, descriptions, and business name
Each card headline maxes at 40 characters. The ad-level description maxes at 90 characters. Your business name maxes at 25 characters. These three appear at the ad level, regardless of which card a viewer sees first.
Logos and CTA buttons
Logos must be square (1:1). The recommended size is 1200x1200px and the minimum is 144x144px. CTAs are optional at the card level but add a clear next step for each product.
2–10 card limit and aspect ratio consistency
You need at least 2 cards and can add up to 10. All cards in one carousel must share the same aspect ratio. Mixing ratios is not allowed. If any single card is disapproved, Google marks the entire ad "Approved (limited)" and it can stop serving within 24 hours.
---
Two Paths: Product Feed vs. Manual Creation
Using Google Merchant Center product feeds (dynamic)
Connect your Merchant Center catalog to a Demand Gen campaign. Google pulls images and product details automatically. Google's documentation recommends at least 4 products for basic eligibility and 50 or more for best results across all placements.
Creating carousel ads manually with uploaded images
No Merchant Center? Upload images directly in the ad builder. You control each card, each headline, and each destination URL. This works well for brand campaigns, seasonal promotions, or products outside your feed.
---
How to Create a Carousel Ad Step-by-Step
Step 1: Set up your Demand Gen campaign
In Google Ads, click "New campaign." Select Demand Gen as the campaign type. Configure your goal, bidding strategy, budget, and audience targeting.
Step 2: Create an ad group and select carousel as ad format
Inside your campaign, create an ad group. Click "New ad." Choose the carousel format from the ad type options.
Step 3: Upload images and organize card order
Upload 2 to 10 images. Keep aspect ratios identical across all cards. Arrange the card order to guide viewers through your story or product lineup.
Step 4: Add ad-level and card-level copy
Add your ad-level headline (40 char max), description (90 char max), and business name (25 char max). Then write a per-card headline for each image. Each card can also point to its own final URL.
Step 5: Add logos and review before submit
Upload your 1:1 logo. Review every card for policy compliance. Submit. Google typically completes review within 24 hours.
---
Carousel Ad Best Practices
Test multiple aspect ratios for placement coverage
Run one carousel with horizontal images and another with square images. Google recommends this approach to find which format performs better for your brand across YouTube, Gmail, and Discover.
Use consistent branding across all cards
Same color palette. Same fonts. Same logo placement. Viewers swipe fast. Inconsistent design breaks recognition and hurts trust.
Tell a story through image sequence
Card 1 grabs attention. Cards 2 through 4 build interest. The final card drives the click. Think of it as a mini landing page inside the ad.
Match copy tone to audience and placement
Discover audiences browse casually. YouTube audiences are in content mode. Tune your headline tone to where the ad will show most.
---
Speed Up Carousel Creation With Coinis
Generate on-brand carousel card images instantly
Coinis's Image Ads workflow generates product images from a URL. Pick your target aspect ratio. Generate a full set of carousel-ready cards in minutes. No stock photo sourcing. No designer brief.
Use Brand Profile to maintain consistent voice across all cards
Brand Profile learns your brand's colors, tone, and visual style. Every card Coinis generates reflects that identity. Keeping 10 cards consistent takes the same effort as generating one.
---
Or let Coinis do it.
From a product URL to a live Meta campaign. AI-generated creatives. On-brand copy. Direct publish to Facebook and Instagram. Real performance reporting. All in one platform.
Start free. Upgrade when you're ready.
15 AI tokens a month. No credit card.
Frequently Asked Questions
Can I mix horizontal and square images in one Google carousel ad?
No. All cards in a single carousel must share the same aspect ratio. Mixing aspect ratios is not permitted by Google Ads.
What happens if one card in my carousel ad is disapproved?
The entire ad is marked 'Approved (limited)' and can be fully disapproved within 24 hours. Fix or replace the offending card and resubmit for review.
Do I need a Google Merchant Center account to run carousel ads?
No. You can upload images manually inside the Demand Gen ad builder. Merchant Center is only required for dynamic product feed carousels.
How many products should I have in my feed for best results?
Google recommends at least 4 products for basic placement eligibility and 50 or more for optimal performance across all placements.