Just like the title of this plugin says. It is a simple to use, popup plugin. It works very well on a premium theme that I currently have. I am using this plugin to supplement my premium theme for additional help and ordering features on my site. The theme that I'm using has MANY shortcode options built in and it doesn't seem to be creating any problems . I would recommend this if you are looking for a simple & effective popup plugin for your blog and/or site.