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User Interaction refers to the way in which individuals engage with a system or interface, typically through input, feedback, and communication. This can include actions such as clicking buttons, entering text, selecting options, and navigating through different screens or pages. User Interaction also involves receiving responses from the system, such as visual cues, notifications, or messages, to indicate that the input has been recognized and processed. Overall, User Interaction plays a crucial role in determining the user experience and usability of a product or service.