A two-unit format that consists of a banner unit and a fullscreen expanded unit.

By default, the Banner unit of the Expandable banner is placed in-page and scrolls with publisher content. When trafficked as a Sticky Banner, the unit appears as a fixed overlay, on top of the publisher content.

When the user interacts with the banner, the ad expands to the expanded unit. Users can tap the close button to exit the expanded unit.

The Expanded unit is a fullscreen modal on mobile devices and fixed size on desktop.