Vendor Payment Options will display all the different payment options that you have configured in WebManager. If you are a multi-line agency, this will display the payment options for all your different vendors.
Using the > icon next to Credit Card, you can review what credit card processor you have setup in WebManager
Using the > icon next to Terms, this is where you can manage terms options for buyers on JuniperMarket. See our full tutorial here on setting default terms for buyers.