An interstitial creative is an ad that either floats on top of a publisher's page on desktop or fills the screen on a mobile device. It's also known as a floating or prestitial ad. This ad format allows flexibility. Because it isn't assigned to a fixed ad slot, it can be almost any shape or size, and you can place it anywhere over a publisher's content.
This guide walks you through the process of building an interstitial creative using the Studio HTML5 SDK . After you've built the creative, you can serve it in both desktop and mobile web formats.
