This extension helps the store admin to show different pop-ups to the different type of users, like existing users, returning users, logged out users, logged in users, etc. Each user can be shown different pop-up window according to requirement. You can even set the time period for which the same user is not shown that pop-up once he has closed that pop-up window. It is a nice way to display important information to various types of users.
This is the EXACT same plugin as distributed by the developer on WooCommerce. The developers’ links are provided above.