4. In the Payments ribbon, click on Braintree integration and add your Braintree Merchant Id, Public Key, and Private Key.
Note: Enable Use Sandbox option if you are using your Braintree sandbox credentials.
Extra: You can specify your own text for the checkout button by adding your text in the Checkout Button Text option.
Extra: By enabling the option Checkout With Paypal you can provide PayPal checkout for your clients.
Where to find your Braintree credentials?
In your Braintree account, go to Settings -> API Keys and copy your Merchant Id, Public Key, and Private Key.