Ad mediation is a system that allows app publishers to manage multiple advertising networks from one unified platform. Instead of integrating several SDKs and juggling different dashboards, mediation brings everything together in a single place. The result is higher fill rates, improved CPMs, and better control over monetization performance.
Ad mediation is the technology that connects your app to several ad networks through one SDK. The mediation platform automatically selects which network delivers the best ad for each impression. By comparing bids from multiple demand sources, publishers can fill more inventory and earn more revenue.
Without mediation, developers would have to manage each network separately — setting up SDKs, tracking performance manually, and switching between dashboards. Mediation eliminates this complexity, creating a centralized, data-driven way to sell ad space efficiently.
When a user opens an app, the mediation SDK sends a request for an ad. The mediation platform then evaluates multiple networks to determine who can serve the most profitable ad at that moment. There are two main methods for doing this: waterfall bidding and in-app header bidding.
Waterfall bidding is the traditional way of serving ads. In this model, the mediation platform ranks ad networks in order of expected performance or priority. It first requests an ad from the top network. If that network cannot fill the request, it moves to the next one, and so on. The process continues down the “waterfall” until an ad is filled.
While simple and predictable, this method can leave money on the table because the platform does not always accept the highest real-time bid — it only moves down the list in sequence.
In-app header bidding uses real-time programmatic auctions. Instead of checking networks one at a time, all networks bid simultaneously for the same impression. The highest bidder wins instantly, and the ad is served immediately. This approach maximizes competition and helps publishers achieve the best possible CPM while maintaining a fair, transparent bidding process.
1. Higher Fill Rates
By accessing multiple ad networks at once, mediation platforms make it easier to fill every ad request. This ensures that users see more relevant ads and that publishers earn more from their available impressions.
2. Increased Revenue
Competition among ad networks drives higher CPMs. With mediation, the system automatically selects the highest-paying ad for each impression, increasing overall earnings without extra manual work.
3. Simplified Management
Instead of integrating and maintaining several SDKs, mediation requires only one. Publishers can track performance, manage settings, and analyze data in a single dashboard.
4. Smarter Optimization
Modern mediation platforms use analytics and machine learning to identify which networks perform best for certain audiences, regions, or formats. This enables continuous optimization and better campaign outcomes.
While ad mediation simplifies monetization, not all networks share full data access. Some large players such as Google and Meta limit what mediation platforms can see or control. As a result, campaign managers may still need to monitor those networks directly.
It’s also important to evaluate the reliability of the mediation platform’s servers, the transparency of its reporting, and the quality of its customer support before integrating.
When selecting a mediation partner, consider these key questions:
To help app publishers maximize revenue and fill ad inventory efficiently by managing multiple networks through one platform.
Yes. By creating competition among networks, mediation drives up CPMs and ensures more of your ad space is sold.
Waterfall bidding requests ads in a set order, while header bidding allows all networks to bid in real time, ensuring the highest bidder wins.
Yes. Whether you run a gaming app, utility app, or content platform, mediation helps you optimize your monetization strategy.
Mostly no. Mediation centralizes most tasks, but some large networks may still require direct access for full control.