Check 13 / 18 LOW impact In the full checklist
Post-purchase one-click upsell 20% take rate
What this check is
An upsell on the confirmation screen hits the shopper at peak willingness, with payment already captured, and gives you a second order without a second acquisition cost.
How to implement it
Offer one relevant add-on on the thank-you step with a single confirm action, and let the shopper charge the same payment method without re-entering details. Keep it to one offer and never block the confirmation details.
How to verify it
Complete a test order, accept the upsell and confirm a second line is charged to the same method and both items appear in the same order or as a clearly linked follow-up order.
All 197 checks, one Google Sheet
This page is the summary. The full checklist carries the priority, the impact score and the tool link for every check — all 197 of them, across 14 categories, as a Google Sheet and CSV with lifetime updates.
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