Once a person installs and opens their app, they keep emailing personalised offers.
Ecommerce store, Target, uses automation superbly. They gather information about casual site visitors. Then, they send an app download link by SMS alerts. Once a person installs and opens their app, they keep emailing personalised offers. After the first purchase, they pop-up a product review window for buyers to rate their experience in-app and in the Play store.