<ul><li>The HOOK Model outlines four key stages that drive user engagement and create habits: Action, Reward, Investment.</li><li>Action Simplification: Examples include launching the camera from the locked screen (Apple), utilizing Google's autocomplete and PageRank algorithm for search, and implementing infinite scroll on Pinterest for browsing content.</li><li>Reward Types: Examples include social validation and community recognition through Instagram likes and Reddit upvotes (Rewards of the Tribe), the thrill of discovery and finding valuable deals on Twitter and online shopping platforms (Rewards of the Hunt), and personal growth and mastery over challenges through Duolingo streaks and progress bars (Rewards of the Self).</li><li>Investment Types: Examples include user-generated content on platforms like Instagram and Spotify, personalization based on user data on LinkedIn and Mint, building reputation through user reviews on platforms like eBay and Stack Overflow, and developing skills through platforms like Adobe Photoshop and gaming tutorials.</li></ul>

The HOOK Model: A Framework for Building Habit-Forming Products

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