You have selected the check option to pay for your pledge. Once you hit 'Submit' you will get an email confirmation with a Letter of Intent which provides details about where to mail your check.
You have selected the Credit Card or PayPal option to pay for your pledge. You will automatically be billed at the amount and frequency you choose below. If you choose PayPal as your payment otpion you will receive notification each time after you are charged for your pledge.