What are benefits end page notification?
Consider a user is reading an excellent article on your website. He finished reading your article and ready to flee away. In this condition Scroll Position Behaviour gets triggered. In response to that a popup shows up with a subscription form or realated article link. If user liked your current content then he will most likely subscribe to the newsletter or he can click next linked article. It increases bounce rate and you get a loyal user who reads and like your content regularly.