UX Case Study: Rewiring Zuzu Marketplace's Checkout in 12 Weeks

Design · 6 min read

Zuzu, a mid-sized peer-to-peer marketplace, engaged in a focused UX audit after noticing cart abandonment spikes during promotions. The audit revealed three principal issues: an unexpected fee tier, unclear shipping times, and a buried seller-rating breakdown. Zuzu’s product team launched a targeted redesign aimed at minimizing cognitive load during checkout.

The redesign implemented a single-column checkout, upfront fee disclosure, explicit shipping date ranges, and a persistent seller-trust panel. Importantly, the team moved away from modal-heavy confirmations to inline edits and inline validation, reducing context switches. They released the changes gradually: first to 10% of traffic, then to 50%, and finally full rollout after measuring a stable improvement.

Results after eight weeks: checkout conversion improved by 14% among returning buyers and 9% among first-time shoppers; support tickets about fees were down 64%. The case demonstrates how surgical UX fixes, driven by a clear audit and phased rollouts, can outperform broad redesigns when the problem set is constrained.