Which of the following is NOT a characteristic of Snackbar?

A Snackbar is designed to provide quick, unobtrusive feedback to users, typically used to show brief messages about operations that have been performed or need to be acknowledged. One of its defining features is that it usually appears at the bottom of the screen rather than the top.

The other characteristics of a Snackbar include the ability to show brief messages, which is consistent with its purpose of providing quick information. Additionally, it can include action buttons that allow users to respond to the message, such as "Undo" or "Retry." Finally, Snackbars are designed to disappear automatically after a short duration, thus helping keep the interface clean and maintaining the flow of user interaction. By understanding these traits, it becomes clear why appearing at the bottom of the screen is not a characteristic of a Snackbar.