First of all, thank you for contacting us and evaluating our plugin.
The only way to trigger the Lead event to Facebook is if the user is redirected to another page on your WordPress site after completing the form. If so, then you would place the Lead event on this ‘thank you’ page. The value’s for this event are optional and can be ignored in this case.
The standard PageView event is automatically added to every page and post for you. The ViewContent event is primarily reserved for important pages, like a product page. If the user visits that page but does not purchase the product, this would allow you to remarket it to them later.
I hope this helps clear things up for you. If not or you have any other questions, please do not hesitate to reach back out to us.