Text message notifications are alerts that inform users about new messages received on their mobile devices. These notifications typically appear on the screen, showing a preview of the message and the sender's name. They help users stay updated without needing to open their messaging apps. Users can customize their text message notifications by adjusting settings for sound, vibration, and display options. This allows individuals to prioritize important messages from contacts like friends, family, or work colleagues. Notifications can also be managed through smartphones and tablets to enhance user experience and minimize distractions.