Instant notifications are alerts that provide real-time updates or information to users on their devices. These notifications can come from various applications, such as social media platforms, messaging apps, or email services, and are designed to keep users informed about important events or messages without needing to check the app manually. When a user receives an instant notification, it typically appears as a pop-up or banner on their screen, allowing them to quickly see the content. This feature enhances user engagement and ensures that important information, like messages from friends or updates from news sources, is not missed.