PayPal Checkout Overview - https://developer.paypal.com/studio/checkout/standard
How PayPal Checkout Works - https://developer.paypal.com/studio/checkout/standard/getstarted#how-pp-checkout-works
Enabling PayPal Checkout on your WebStore
Steps:
1. To generate credentials for the PayPal Checkout integration, log into your PayPal Business account.
2. Go to the Developer Dashboard: https://developer.paypal.com/dashboard/
3. Click your user in the top right, and in the menu, click Dashboard.
4. Click Apps & Credentials from the menu on top, or to the left of the page.
5. You should see a toggle between Sandbox and Live. Make sure you click Live.
6. Under a table for REST API Apps, click the Create App button.
7. Enter a name for your App.
8. Pick Merchant as an App Type. If there's a dropdown for Region, you should be able to keep Region unselected.
9. Once that is complete, it should now display a Client ID and a Secret Key.
10. Copy these two values.
11. In WebStore Manager, under Orders> Payment Processor Set-up, select PayPal Checkout from the dropdown list.
12. Click the Configure button.
13. Check the Enable PayPal Checkout box.
14. Paste the App Client ID and App Secret into the integration.
15. Select a Default Tender and Currency, and save changes.
Note, if you previously used another PayPal integration, it needs to be disabled first.
It is recommended that you run a test transaction after enabling the new payment gateway and process your order at the POS.