Details on key hooks which can be leveraged in many ways.
Hook that fires at the very end of (successful) form entry processing.
Hook that fires during form entry processing, after initial field validation has passed.
Hook that fires at when form shortcode is run, before the form is displayed.
Hook that fires at when form shortcode is run, after the form is displayed.
Hook that fires after a form's submit button is clicked, but before form data is validated or cleaned.