Required fields
Open Commerce Checkout and review which fields are required. Extra required phone or company fields increase abandon rates — keep them optional unless operations need them.
Address validation
If address autocomplete rejects valid local formats, loosen validation for those regions or provide a manual override path for support.
Shipping options
Zero shipping rates for a region look like a broken checkout. Confirm zones, weight rules, and free-shipping thresholds cover the cart under test.
Test checkout
Run a sandbox purchase on desktop and phone after every checkout change. Confirm the confirmation page, order email, and Orders list update within a minute.