What are two reasons advertisers should consider engagement when marketing apps?

Question: What are two reasons advertisers should consider engagement when marketing apps?

• A significant percentage of app users churn after three months.
• Apps can be accidentally uninstalled.
• Users who haven’t yet downloaded an app might need extra incentive.
• Some users download apps and then forget about them.

The right answer was: A significant percentage of app users churn after three months. and Some users download apps and then forget about them.