Habit-forming products are designed to encourage repeated use by creating a cycle of engagement. They often leverage psychological triggers, such as rewards or social validation, to keep users coming back. Examples include apps like Facebook or Instagram, which use notifications and likes to stimulate user interaction. These products typically follow a four-step process: trigger, action, variable reward, and investment. The initial trigger prompts the user to take action, which leads to a reward that varies in nature. This unpredictability enhances user engagement, making it more likely for individuals to develop a habit around the product.