Most of the time, until a visitor reads through the content, they don’t know the benefits of the product, and may leave. Used as an entry popup, it will tell your visitor about all the benefits they can receive before they ever read the content. As such, you may not require very high quality content to convert visitors into customers.
You can use these popups to increase your subscriber list. With a ready-made form on the popup, the visitor simply needs to insert a few details and they become subscribers. With an effective email marketing campaign, they will soon become customers.