Introduction to modal popups
Modal popups are small windows with certain specified content, which appear on top of regular content and force the visitor to take some sort of action (this could be anything from reading a message to watching a video or clicking a button).
GroovePages has a separate section within its page builder where you can create and configure such popups. To access the popup builder, click the icon labeled "Popups" in the main left menu bar:
To make thing fast and efficient, GroovePages offers a number of pre-made templates you can use to create your modal popups. It is also possible to use the element library and add things to any of these templates.