Navigate to your WooCommerce website admin page.

You can use the "Sandbox mode" checkbox to toggle between Live and Sandbox modes.

Navigate to https://admin.portone.cloud/dashboard and click "General" 

Switch to the tab WooCommerce Plugins setting page and paste in the "PortOne Key" field

Go back to the PortOne dashboard, and click this to copy PortOne Secure Secret Key.

Now switch back to the tab WooCommerce Plugins setting page and paste in the "PortOne Secure Secret Key" field

You can click on "Show shipping details" to display shipping details in PortOne Checkout Screen

Installation is complete and the users will now be able to see PortOne payment option on the checkout page. 

How to Install and Activate PortOne Plugin for WooCommerce