I use Contact Form 7 for receiving orders for the products presented on my site.
After a visitor submits his message and I want him to see another page where I thank him for his order. So, instead of just receiving the confirmation "Your message was sent" I want him to be redirected to the thank-you page.
Thus I would be able even to track conversion via google analytics even if I don't have a e-commerce site per se.
[ Larry ]