Case Study: Czc.cz achieves 7.5% revenue increase with VWO split URL testing

How Czc A/B Tested Trust Factor To Increase Its Revenue

Czc.cz, a leading online electronics retailer in Prague, wanted to convince price‑sensitive first‑time visitors that its prices were competitive and increase site revenue. To test trust signals, Czc.cz used the VWO platform and its Split URL Testing capability to evaluate adding the Heureka comparison-site badge and ratings on product pages.

Using VWO split‑URL tests with over 90,000 visitors, Czc.cz trialed four Heureka badge/ratings placements; the slide‑in ratings bar on the left (Variation 4) proved the winner, delivering a 7.5% uplift in revenue with 95% confidence. VWO’s testing showed the left slide‑in boosted credibility without driving clicks off‑site (unlike other placements), giving Czc.cz a clear, measurable conversion win and actionable optimization insights.

Czc.cz