Cross-promotion is a savvy strategy utilized by app developers to market their apps to users who are already engaged with other apps within the developer’s portfolio. By leveraging their own first-party data, developers can effectively target valuable users. Cross-promotion campaigns are executed through a variety of methods, including banner ads, interstitial ads, push notifications, and in-app recommendations. Hyper-casual publishers, in particular, rely on cross-promotion to sustain user engagement across their app portfolio. Publishers can leverage their ad inventory within their mediation layer to run promotional ads for cross-promotion purposes.