Alert banner is a powerful communication tool used to display important messages prominently across the user interface. These messages can range from critical system-wide issues, such as errors or warnings, to informational or success messages. Alert banners are usually placed at the top of a page and include a clear message and, if necessary, an action for the user to take. They can be dismissed by the user once read. Alert banner component plays a key role in guiding users, ensuring they are aware of significant information or changes within the application, thereby enhancing the user experience.