Triggers cue the user to take action and are the first step in the Hook Model. Triggers come in two types—external and internal. External triggers tell the user what to do next by placing information within the user’s environment. Internal triggers tell the user what to do next through associations stored in the user’s memory. Negative emotions frequently serve as internal triggers. To build a habit-forming product, makers need to understand which user emotions may be tied to internal triggers and know how to leverage external triggers to drive the user to action.
