Here you can establish the type and interval of payment. The two types of payment are a One-Time payment and a Subscription. The four pay intervals are Monthly, Quarterly, Semi-Annually, and Annually. If One-Time payment is selected, then the payment period option will be ignored.
Subscription Title – Saved title that will appear on PayPal transaction list.
The “No Trial Period” checkbox is a PayPal only feature. If checked, the “Recurrence Amount” field (if there’s an amount there) for the first period and then the form total for subsequent periods. If there’s no amount in the “recurrence amount” it’ll use the form total for the first period, too. For example, if you select “monthly” then put 0 in that recurrence amount field, the first month will be free.