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title: "Q4 Checkout Sprint Review"
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#### PRODUCT ENGINEERING
# Q4 Checkout Sprint Review

Reducing guest checkout drop-off and latency before peak holiday traffic.

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## What Shipped in Sprint 18

- Consolidated address and shipping into a single step on mobile viewports
- Added instant retry on `POST /v2/checkout/confirm` timeouts
- Deferred non-critical coupon validation until payment method selection

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## Funnel Metrics Before & After

| Stage | Sprint 17 Baseline | Sprint 18 Actual |
| :--- | :---: | ---: |
| Cart to Checkout | 68.4% | **71.2%** |
| Shipping Completed | 54.0% | **63.8%** |
| P95 API Latency | 410 ms | `185 ms` |

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## Next Sprint Priorities

1. Roll out Apple Pay and Google Pay express buttons to 100% of US traffic
2. Backfill automated synthetic checks for localized tax rounding
3. Hand off editable review slides to finance and support leads

> Keep checkout forms under six visible inputs on mobile screens.