User engagement is crucial for business profitability as it signifies the value users find in a product or service, leading to revenue through ads, subscriptions, or sales. Businesses must define what engagement means in the context of their model, understanding that metrics such as clicks or views may indicate success for some but not all platforms. To calculate user engagement, companies should track both positive and negative user actions, using analytics to identify which events lead to disengagement. Improving engagement involves analyzing user behavior to enhance the user experience, reduce friction, and increase usability, thereby making products more "sticky." Product teams can improve user engagement by understanding what users find valuable, simplifying interfaces, and providing educational resources and onboarding for new users. Effective communication, including in-app notifications and surveys, is essential for gathering user feedback and maintaining engagement, aiming to make the app a regular part of users' routines.