How to use Developer WP Hook Hook Tag

Okay I figured it out…

You can either add_action in your own custom plugin, or use a plugin like Code Snippets to make this work. I used Code Snippets, and added and activated a new snippet like this:

add_action( "jeff_test_ninja_forms_wp_hook", "jeff_my_ninja_forms_function" );
function jeff_my_ninja_forms_function($form_data) {
// do something with $form_data
}

Then when I go to my Ninja Form, and I can Add WP Hook Action, where it asks for Hook Tag I put: jeff_test_ninja_forms_wp_hook