Alerts are notifications that inform users about important events or changes. They can be found in various applications, such as email, social media, and mobile devices. Alerts help users stay updated on messages, reminders, or breaking news, ensuring they don't miss critical information. Alerts can be customized based on user preferences, allowing individuals to choose what types of notifications they want to receive. For example, a user might set alerts for calendar events, text messages, or news updates. This personalization enhances the user experience by providing relevant information in a timely manner.