Telling user about updates in interface

1. What is an updated user interface?
2. What is the user interface?

What is an updated user interface?

UI updates are changes to the user interface (UI) of a product to improve its look and feel. This could be as simple as changing buttons or simplifying navigation.

What is the user interface?

The user interface (UI) is the point of human-computer interaction and communication in a device. This can include display screens, keyboards, a mouse and the appearance of a desktop. It is also the way through which a user interacts with an application or a website.