AppsFlyer is a mobile attribution and marketing analytics platform that helps businesses track the performance of their mobile apps. It provides insights into user acquisition, engagement, and retention, allowing companies to understand which marketing campaigns are most effective in driving app installs and user activity. By using AppsFlyer, marketers can optimize their advertising strategies based on real-time data. The platform integrates with various advertising networks and offers features like deep linking and fraud protection, ensuring that businesses can make informed decisions to enhance their app's growth and user experience.