In-app notifications are messages that appear within a mobile app or software to inform users about important updates, events, or actions. These notifications can alert users to new messages, reminders, or changes in their account status, enhancing user engagement and experience. Typically, in-app notifications are designed to be non-intrusive, allowing users to continue using the app without interruption. They can be customized based on user preferences and behaviors, making them a valuable tool for developers to communicate effectively with users while keeping them informed about relevant information related to the app's features or services.