- Google Ads has no native testimonial format. Testimonials live inside responsive display ad image assets.
- Design testimonial images in three ratios: landscape (1200×628 px), square (1200×1200 px), and portrait (900×1600 px).
- Store ratings show star scores automatically on eligible ads. You need a 3.5-star average and at least 100 reviews.
- Upload 3–4 image variations per ad. Google AI learns which performs best and shifts impressions accordingly.
- Coinis AI Testimonial turns a customer quote into a branded, export-ready visual. No design tool needed.
How Google Ads Handles Customer Testimonials
Google Ads has no dedicated customer review ad format. Social proof works through two methods: visual testimonial assets you design and upload, or automated store ratings that display stars on eligible ads.
Two main approaches: visual testimonial assets vs. automated store ratings
Visual assets mean you create an image with a customer quote and upload it to a responsive display ad. Store ratings automatically show star scores from verified reviews when your account qualifies. Both methods can run at the same time.
Why Google Ads doesn't have a dedicated testimonial ad format
Responsive display ads (RDAs) are the closest Google offers. They accept images, headlines, logos, and descriptions. Google's AI assembles them into combinations and serves the best fit for each placement. Your testimonial lives inside the image asset.
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Method 1: Create a Visual Testimonial Image Asset
A strong testimonial image needs three things: a real customer quote, a customer photo or product screenshot, and your brand logo in a clean layout.
What makes a strong testimonial image
Keep the quote short. One sentence is ideal, two at most. Use an authentic photo instead of stock imagery. Include the customer's name and, if possible, a job title or location. Those details build credibility fast.
Recommended dimensions and formats for Google Display ads
Per Google's Ads Help Center, responsive display ads support three aspect ratios. Landscape (1.91:1, recommended 1200×628 px). Square (1:1, recommended 1200×1200 px). Portrait (9:16, recommended 900×1600 px). Max file size per image is 5 MB. Accepted formats are JPG and PNG.
Upload all three ratios. Google serves the version that fits each ad slot best.
Step-by-step: Design your testimonial graphic
- Pick your strongest one-sentence review.
- Add a customer headshot or product photo as the focal point.
- Place your brand logo in a corner. Keep it small and out of the main image area.
- Keep text inside the image minimal. Your headline fields handle the supporting copy.
- Export each version in all three ratios before uploading.
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Method 2: Use Automated Store Ratings (If Eligible)
Store ratings let Google display star scores automatically on your ads. No custom creative needed.
What store ratings are and how they display
They appear as star icons with a review count beneath your ad text. Google pulls ratings from the Google Customer Reviews program and approved third-party review aggregators, including TrustPilot, Yotpo, and Bazaarvoice.
Eligibility requirements (3.5+ stars, review count threshold)
Per Google's Ads Help Center, you need a 3.5-star average or higher and at least 100 reviews. The exact minimum count can vary by business type and country. Google evaluates eligibility automatically.
How to enable store ratings on your ads
Enroll in Google Customer Reviews inside Google Merchant Center. Or connect an approved third-party review partner. Once you cross the eligibility threshold, ratings appear on your ads automatically. There is no campaign-level toggle to flip.
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Upload Your Testimonial to a Responsive Display Ad
Creating a responsive display ad campaign in Google Ads
Go to Google Ads and create a new Display campaign. Choose "Sales" or "Leads" as your objective. At the ad creation step, select Responsive Display Ad as your format.
Uploading your testimonial image asset
Upload your testimonial images in each ratio. Google's Ad Strength indicator flags gaps if you're missing a key size. Aim for at least one landscape and one square before going live.
Writing headlines and descriptions to support the testimonial
Per Google's responsive display ad specs, write up to five short headlines at 30 characters each and one long headline at 90 characters. Add up to five descriptions. Keep headlines benefit-led. The image carries the testimonial. The headline reinforces it.
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Best Practices for Testimonial Display Ads
Image quality and composition guidelines
Use real photos with natural backgrounds and organic lighting. No overlaid text. No fake buttons or clickable elements. No collages. Google's ad policy prohibits these, and they perform poorly even when approved.
Avoiding common design mistakes
Logo placement matters. Keep it small and away from the main visual. Avoid excessive blank space around the subject. Per Google's display ad guidelines, clear single-subject images outperform busy, text-heavy designs every time.
Creating 3-4 ad variations for A/B testing
Google recommends uploading three to four image variations per ad. Try different customer quotes and different photos. Google AI tracks which combinations earn the most engagement and shifts impressions toward the winners.
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The Faster Way: Use AI Testimonial Creatives
Designing testimonial images in three ratios by hand takes time. There is a faster path.
Why generating testimonials automatically saves time
Coinis AI Testimonial turns a customer quote into a formatted, on-brand visual. It reads your Brand Profile, applies your colors, fonts, and tone, and generates the image. No design tool. No manual resizing. Export-ready files in minutes.
How to move from testimonial assets to campaign launch
Export the images from Coinis. Upload them directly into your Google Ads responsive display ad. Coinis handles creative production. You handle targeting and budget inside Google Ads. Direct Google Ads publishing is on the Coinis roadmap.
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Frequently Asked Questions
Does Google Ads have a customer review ad format?
No. Google Ads has no dedicated testimonial or customer review format. You add social proof either by uploading a testimonial image asset inside a responsive display ad or by enabling store ratings, which automatically show star scores on eligible ads.
What image sizes do I need for a Google Display testimonial ad?
Per Google's Ads Help Center, upload images in three ratios: landscape at 1200×628 px (1.91:1), square at 1200×1200 px (1:1), and portrait at 900×1600 px (9:16). Max file size is 5 MB per image. JPG and PNG are both accepted.
How do I qualify for store ratings on Google Ads?
You need a 3.5-star average rating or higher and at least 100 reviews collected through the Google Customer Reviews program or an approved third-party aggregator. Google checks eligibility automatically.
Can I put text directly on my testimonial image for Google Ads?
Google's display ad policy and best-practice guidelines both discourage overlaid text on image assets. Keep text minimal on the image itself and use the headline and description fields in the responsive display ad for supporting copy.