The Hook Model
Eyal introduces the Hook Model, a four-phase process that companies use to create habits: Trigger, Action, Variable Reward, and Investment. Each phase plays a crucial role in forming user habits. For example, a trigger might be a notification that prompts the user to take action, such as clicking on a link. The action is followed by a variable reward, which keeps the user engaged by offering unpredictable outcomes. Finally, the investment phase involves the user putting something into the product, like time or data, which increases the likelihood of future engagement. This model is exemplified by platforms like Pinterest, where users are drawn in by intriguing images (trigger), click to explore (action), find varied content (variable reward), and save or share pins (investment).