When you are notifying a user of the outcome of an action they have taken, provide visual feedback with a Toast Notification.
When you are notifying a user of an action they have taken and need to provide visual feedback.
It is used immediately after a specific event such as a user action that does not relate to an object on the page. For example, confirmation of deleted items.
E.g. a notification about deleting successfully is positive because the user’s intended action was successful.
Inline notification: Inline notifications appear within content areas as close as possible to the thing that it’s about. It is used for contextual information.
Global Notification: A Global Notification is a message object used for system-level notifications that inform the user about system status such as logging in and background processes like data imports.
Confirmation Modal: The confirmation modal confirms the end result of an action such as Destructive / Irreversible actions / Positive actions.
Here are some examples of other existing design systems: