Notifications are alerts or messages that inform users about important events, updates, or actions within an application, website, or system. They serve to grab a user's attention and provide timely information without requiring them to actively seek it out.^[1]

Notifications can come in various forms, including pop-up windows, banners, badges, sounds, or vibration alerts on mobile devices. They cover a wide range of purposes, such as notifying users about new messages, system updates, friend requests, reminders, or transaction confirmations.

Effective notification design considers the user's context and preferences, ensuring that notifications are relevant, non-intrusive, and actionable.