ForAppRe-engagement campaigns,were commend targeting:

For App Re-engagement campaigns, targeting as broadly as possible initially allows the Twitter algorithm to learn and optimize effectively. By exposing the campaign to a wide audience, the system gathers more data on user behavior and engagement, which helps it identify the most receptive segments for your app. This broad approach enables the algorithm to discover unexpected, high-performing audiences that might be missed with a narrow initial targeting strategy. Once sufficient data is collected, you can then refine your targeting based on performance insights. Targeting only Android users or a select group initially limits the data available for optimization, potentially hindering campaign performance and discovery of valuable audiences.