The short answer

The highest-impact changes are guest checkout, digital wallets, address autocomplete, removing optional fields, and clear total cost shown before the payment step. Keep AVS, CVV and risk scoring — remove friction from data entry, not from verification.

Wallets do the heavy lifting

Apple Pay, Google Pay and Link-style flows remove the entire form and often improve authorisation rates as well. For mobile-heavy stores this is usually the single largest conversion gain available.

Surprise costs kill conversion

Shipping and taxes revealed at the final step are the most cited reason for abandonment. Show the true total earlier, even when it is higher.

Key takeaways

  • Digital wallets are the biggest single conversion lever
  • Remove fields, not verification
  • Show the full total before the payment step

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