Glossary term Retention
Hook Model
A four-step cycle for building product habits: a trigger prompts an action, which delivers a variable reward, followed by an investment that makes the next trigger more likely. The investment also raises the cost of leaving.
Where you see this in practice
The mechanics that lean on it
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Variable Reward Schedule
A reward system where the outcome of an action is uncertain, the user knows they will receive something, but not exactly what.
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Streak / Streak Bonus
A counter that increments each time a user completes a defined action within a set time window, typically once per day.
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Daily / Weekly Quests
Structured, time-limited objectives that direct user behaviour toward specific actions and reward completion.