Push notifications are excellent for real-time communication and engagement. They are used to deliver timely and relevant information to users, even when they are not actively using the app. They can be used for various purposes such as: 1. Alerting users about new content or updates. 2. Sending reminders or alerts about appointments or deadlines. 3. Promoting products or offers. 4. Enhancing user engagement by providing personalized content. 5. Increasing return traffic and user retention.