Pop-Ups have a bad reputation from a user experience perspective. Unfortunately, despite the rumors that nobody likes them, they seem to work amazingly well and the data backs it up.
While there are quite a few different plugins available, we’re going to focus on a Ninja Popups review for today. It’s a premium list building plugin available from Envato Market that allows you to create a user-friendly pop-up opt-in with a lightbox overlay as seen in the image below. Ninja Popups for WordPress also allows for social sharing, footer opt-in bars, and inline opt-ins.