Mobile applications utilize push notifications to engage users by delivering timely updates or reminders directly to their devices, even when the app is not actively in use. These notifications can inform users about new content, promotions, or messages, ultimately enhancing user experience and encouraging interaction. By appealing to users with personalized and relevant messages, push notifications can drive user retention and boost app engagement. However, if misused, they can lead to user frustration, highlighting the importance of utilizing them judiciously and ensuring content is valuable and relevant.