Critical Notifications are urgent messages that inform users about important events or changes that require immediate attention. These notifications can come from various sources, such as mobile apps, email, or system alerts, and are designed to ensure that users are aware of significant issues, like security breaches or system failures. Typically, Critical Notifications are prioritized over regular messages, often featuring distinct sounds or visual cues to grab the user's attention. They play a vital role in maintaining safety and efficiency, especially in environments like healthcare, finance, or emergency services, where timely information can be crucial.