Interstitial & Pop-ups: Market Overview

Interstitials and pop-ups are ad formats that interrupt user flow by appearing as full-screen or partial overlays between content states or on page entry/exit; they can be static, animated, video, or rich-media and are used on both mobile and desktop. Delivered via ad servers or programmatic channels, they are measurable for viewability and engagement but are often regulated due to potential user disruption and platform policies.

Think of interstitials and pop-ups like a quick-stop billboard that appears between scenes of a movie — they grab attention during a natural break. You’ll find them served by publishers’ ad servers, SSPs or ad networks and bought programmatically through DSPs in RTB or via direct buys, with targeting layered by cookies, device IDs, or contextual signals. Creative specs, frequency caps and viewability measurement matter a lot because a high-impact placement can drive conversions but also cause churn if overused. They often require consent handling and must comply with platform rules and regional privacy laws to stay in rotation.

Buyers include brand advertisers seeking high attention, performance marketers chasing installs or leads, and app developers monetizing session transitions; sellers are publishers and app owners offering interstitial inventory via ad networks, SSPs and exchanges. Agencies and DSPs aggregate demand and optimize bids, while exchanges and SSPs mediate supply and enforce format/creative policies. Platform gatekeepers (browsers, app stores) and regulators (GDPR, CCPA) shape acceptable use, so you’ll see shifts in pricing and availability by region and device as compliance and user tolerance change.