+40% conversion lift
How heatmap analysis and six targeted changes took MouthShield from 4.69% to 6.6% conversion in 17 days.
+40%
Conversion lift
4.69%
Before
6.6%
After
17 days
Time to result
$0
Ad spend increase
None
Dev work required
The challenge
MouthShield is a single-product DTC brand selling a mouth guard for breathing issues. Partnered with King Edward First (SEO agency), they were converting at 4.69% but couldn't figure out what was stopping visitors from buying.
$3K-$10K/mo
Traditional CRO agency
$200+/mo
Enterprise tools + dev time
What the AI found
Grona ran heatmap analysis on MouthShield's product page and analyzed competitor sites. Four issues surfaced.
Dead clicks on '20% off' image
Mobile visitors kept tapping a product image with '20% off' on it, trying to apply a discount that was already in the price.
Buy Now button was a dead end
The nav bar's 'Buy Now' CTA led back to the same page. The most prominent button was competing with Add to Cart.
Visitors leaving to 'How it Works'
Users were clicking away from the product page to learn how the product worked. Critical info lived on a separate page.
Trust signals buried below the fold
Reviews and free shipping were nowhere near the purchase decision point.
Five changes, one snippet
All implemented through chat. Deployed with a single JavaScript snippet.
'20% off' image with no clear pricing → Struck-through original price + discounted price + percentage saved
Social proof buried far below Add to Cart → Reviews and ratings moved directly above the Add to Cart button
Free shipping hidden in top banner → Free shipping badge right under the product name and price
'How it Works' on a separate page → Key product info brought onto the PDP. Nav bar disabled.
'Buy Now' nav button looping back to same page → Removed the competing CTA. One path: Add to Cart.
From URL paste to winner in 17 days
Day 1-3
Research + heatmaps
AI analysis + dead-click identification.
Day 4-7
Create variations
Five changes, all through chat.
Day 8
Deploy test
One snippet. Auto traffic split.
Day 17
Winner found
+40% lift. Statistically significant.
The results
Measured over 17 days. No additional ad spend.
-58%
Session depth
$0
Extra ad spend
17 days
To winner
Agency Partner“
Partnering to build and implement split tests for MouthShield has been a seamless and rewarding experience. Ali and Saad were super responsive, always went the extra mile, and were just genuinely kind throughout. We saw real, actionable results from the split tests they helped us run, and I wouldn't hesitate to work with them again. They're the kind of people you want on your side.
King Edward First added CRO as a service offering using Grona. No specialist needed.
Learn how agencies use GronaKey takeaways
Heatmaps reveal what analytics can't.
The dead-click pattern on the '20% off' image would never show up in Google Analytics. Without visual data, this conversion killer stays invisible.
Your best CTA might be your worst enemy.
The 'Buy Now' button had the highest click rate on the page. It was also sending people nowhere. High engagement doesn't mean high conversion.
Stop sending visitors away from the purchase.
Every navigation link on a product page is an exit opportunity. Bringing 'How it Works' content onto the PDP and disabling the nav bar kept visitors focused.
Make applied discounts obvious.
If a discount is already applied, show the math. A crossed-out price with a percentage saved eliminates the 'where do I enter the code?' anxiety.
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