PayPal Standard has the following parameters:
ID– Payment gateway ID, it is the system parameter;
Caption – the name of the payment gateway that will be visible for users.
Active - status of the Payment Gateway;
PayPal account email – enter here the email address which you use for PayPal account;
Currency code – enter the currency code used by PayPal (USD, EUR, GBP etc.).
PayPal Sandbox – check this box to enable the PayPal test account.
For more information about this gateway go to http://www.paypal.com/