The alert appearing on an Android device to signify the arrival of an SMS or other messaging app communication. For example, a visual banner at the top of the screen accompanied by a sound, vibration, or both signals new incoming messages.
This feature is essential for timely communication, enabling users to respond promptly to urgent matters, stay informed of important updates, and maintain efficient workflow. Historically, early mobile phones relied on simple beeps or flashes for alerts, but modern systems provide customizable and detailed information at a glance, enriching the user experience.