unable to use authorize.net form plug-in

I am not a webDev, i dont know/understand what: “[wpspf-paymentform]” shortcode for payment form.” means.

i have two sites, i need authorize.net configured for: EarlyBirdRegistration.Net/EBR an TheLearnersLabFoundation.org

ive done the set up, but i dont know what “[wpspf-paymentform]” shortcode for payment form. means and cannot do it.

please explain inlay terms, not everyone putting together a site is a WPDev

[email protected] or [email protected]