
Last Updated: June 1, 2026 | Reviewed by Devon Cox, President, ConversionTeam
We implemented a persistent shopping cart banner across their mobile site, keeping selected items visible throughout the customer journey.
Persistent mobile UI elements keep purchase intent visible across every page transition - exactly what mobile sessions need, and the kind of mobile-aware test design behind their mobile CRO work.
Key Achievements:
Mobile traffic was increasing rapidly, but the conversion wasn't keeping up. Users were adding products to cart but failing to complete purchases.
We proposed adding a persistent shopping cart banner that would remain visible throughout the customer journey.
Cart Banner Features:
Test Parameters:



| Metric | Control | Variation 1 | Variation 2 |
| Users | 865,508 | 868,293 | 865,522 |
| Transactions | 1,466 | 1,501 | 1,583 |
| Conversion Rate | 0.17% | 0.17% | 0.18% |
| Revenue Per User | $1.48 | $1.49 | $1.55 |
| Revenue Lift | — | 1% | 5% |
| Confidence | — | 71% | 98% |
The persistent cart banner solved a mobile shopping problem by bridging the gap between browsing and purchasing. There were two factors behind its success:
Want to learn more about how we can optimize your mobile shopping experience? Let's discuss how our data-driven approach can boost your e-commerce revenue.
Appendix: Detailed Test Parameters and Statistical Analysis
Statistical Analysis
| Metric | Value |
| Confidence level | 98% |
| Z-score | 2.12 |
| P-value | 0.0169 |
| Conservative lift estimate | 5% |
| Test lift | 8% |
| Sample size | Over 1.7 million users |
| Test duration | Multiple weeks |
| Participation rate | Even split between variations |
Test Parameters
| Parameter | Details |
| Device targeting | Mobile only |
| Browser targeting | All major mobile browsers |
| User segments | Adult customers only |
| Page scope | Homepage and category pages |
Field Notes