Advertising, users, app stores, developers, and other stakeholders all play a part in the dynamic and complex ecosystem that is the app download ecosystem. The platforhow to play rummy gamems where users can find and download apps that app developers create and publish are the Apple App Store and Google Play Store. App stores allow developers to monetize their works while curating and promoting apps. With the use of targeted campaigns inside apps, advertisers can reach and interact with users through this ecosystem.