The document summarizes 5 of the biggest changes to the iOS App Store and how app marketers can adapt their strategies. The changes include: 1) infinite horizontal scrolling replacing batches of 25 apps, emphasizing top placement; 2) new social features like Facebook likes and location-based offers; 3) transitioning from UDIDs to a new advertising identifier; 4) screenshots gaining prominence over text; and 5) increased app downloads and reduced user acquisition costs following the iPhone 5 launch. The document provides recommendations for app marketers to address each change.