To set up a payment gateway in WooCommerce, log in to WordPress admin and go to WooCommerce → Settings → Payments. You will see available gateways like Cash on Delivery, Bank Transfer, PayPal, Stripe/WooPayments, etc. Click the gateway you want, then Enable it and open Manage. Add required details like API keys, business email, or bank info. Save changes, then run a test checkout using a test product. Finally, confirm order emails and payment status update correctly.
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