JD Prater discusses strategies for identifying, acquiring, and retaining app users through search and social ads. The strategies involve leveraging multiple analytics platforms to understand audiences, developing targeted campaigns and creative tests for acquisition, and expanding efforts across networks and objectives to retain users over time through re-engagement campaigns. Data-driven testing of audiences, creative, networks, and a focus on optimizing for in-app events are emphasized to improve key metrics like cost per install and monthly active users without increasing budgets.